The £88.5m signing was substituted in the 63rd minute as his disappointing time at Chelsea continues, with the Ukraine international yet to score a Premier League goal in his 19 appearances.

Mudryk joined Stamford Bridge from Shakhtar Donetsk on a eight-and-a-half-year deal in January and he is yet to impress, but Pochettino believes the 22-year-old needs more time to adapt to the Premier League.

• Bournemouth 0-0 Chelsea - Match report and highlights
• How the teams lined up | Match stats
• Get Sky Sports | Stream the Premier League and more on NOW

The Chelsea head coach told Sky Sports: "He is improving. He still needs to learn; the Premier League is very fast, the speed of the game is so fast.

"I think it's about understanding the game better, try to be more connected sometimes with the team.

"We need to give the time and to give the tools for him to improve during the season."

Mudryk was part of a £1bn splurge by Chelsea since their takeover in May last year, but their spending is not translating to success on the pitch with the drab goalless draw at Bournemouth leaving them with five points from their opening five games.

Chelsea have only scored five goals in the Premier League so far this season - their fewest after five games of a top-flight campaign since 1995-96 (5), when they finished 11th.

The Blues wasted several chances at the Vitality Stadium on Sunday and Pochettino admitted his side need to be calmer in front of goal if they are to solve their scoring issues.

He said: "We need to be tough in the way we are trying. It's about improving our efficacy in front of the goal.

"We need to be calm also, but in these types of circumstances it is not easy for the players to be calm in front of the goal but we cannot blame no one."

Poch on booing: Fans can do what they want

Some Chelsea fans greeted the full-time whistle at Bournemouth with boos as the 0-0 draw left the Blues languishing in 14th place with just one win in their first five league games.

Pochettino's side were also booed off in their home defeat to Nottingham Forest before the international break.

"I'm not going to ask the fans for patience," the ex-Tottenham boss said. "They need to behave how they want to behave.

"We cannot put excuses because I think it was a club decision to do what we need to do but that is the process that we need to be strong in our belief.

"Of course we are disappointed because the fans are disappointed because of the situation. I'm not worried about that because we know what we are doing and I think when we start to recover players, be more competitive and to have players that can make an impact from the bench with more squad numbers, I think it's going to be a team that's going to win many games."

Pochettino named three outfield players aged 19 or under on the bench as well as two goalkeepers as the club's injury crisis continued to deepen, with British-record signing Moises Caicedo picking up a knee knock on international duty with Ecuador.

Marc Cucurella and Noni Madueke were also fresh additions to the absentee list at Bournemouth, taking the total number of players unavailable to the manager to 12.

Pochettino added on the fans' frustrations in his post-match press conference: "What can we do?" For me, I have nothing to say. The fans can do whatever they want.

"We know what we need to do, we are strong in our belief. We have 12 injured and [on Sunday] we had three or four young guys and two 'keepers on the bench.

"I'm going to cry? I'm going to complain? To who? I need to accept this, the challenge and keep being positive."

The 51-year-old continued: "Bournemouth is a good team, they are going to compete. Every team is going to compete and be difficult.

"But these are the circumstances we need to accept and be positive, patient. We are not going to change in the way we do things.

"What can I do? Only to keep believing. If you say to me we have today [Sunday] all of our players, all of our signings, no injuries, and maybe we cannot win this game? Then maybe I can tell you we need to see [it] in a different way. But we cannot lie to the people."

Hasselbaink: Chelsea players need to be more selfish in front of goal

Former Chelsea striker Jimmy Floyd Hasselbaink told Sky Sports:

"Someone needs to take the responsibility to say, 'I'm going to go by myself and I'm going to finish with a shot'.

"We didn't see enough of that. We saw passes that put their team-mate in, but the passes weren't great.

"Sometimes you have to be more selfish and go direct and finish the action. It was not enough.

"They are creating chances, they're playing well and they're passing the ball up to that final third. The issue here is the final pass and scoring goals, it's that final bit that they have to figure out."

Carney: Chelsea trying to score perfect goal

Ex-England Women winger Karen Carney told Sky Sports:

"I feel like Chelsea have tried to create the perfect team by bringing these players together and today [Sunday], they tried to score the perfect goal doing the same thing.

"Theo (Walcott) and I were saying for the whole game 'just shoot' because every time you dribble with it, Bournemouth kept dropping and they kept running into a wall.

"Pullbacks need to be better, take on the shot, take the responsibility and ownership because it's not the perfect goal, but it's what Chelsea are trying to do. It won't happen in the Premier League."

Jackson struggling to fill Chelsea goals void

Sky Sports' David Richardson:

New season, new signings but the same old scoring problems for Chelsea.

Five goals in five Premier League games represents their worst start at the top end of the pitch since 1996.

Their troubles last season - 38 in 38 matches - led to Kai Havertz's departure but one of his replacements Nicolas Jackson is faring no better. The injury to Christopher Nkunku in pre-season has proved to be a significant blow.

The 22-year-old has scored once, missed six big chances and has had the sixth-most shots in the division.

Jackson started to get desperate at Bournemouth, slicing one effort from inside the box so dreadfully wide that he fell over in the process. He is also now one booking away from a suspension.

The new Chelsea ownership may have spent over £1bn on transfers since taking over last year yet they have badly overlooked the need for a proven Premier League striker.

Neville: Chelsea lack stability - it's chaotic!

Sky Football pundit Gary Neville:

"It's just a little bit mad. It's chaotic. We've been saying it for 15 months. The number of players they have brought in, I have just seen Palmer come on, who was bought for around £40m and you think 'there is another one'.

"With Manchester United there is a lack of stability at the top of the club, that lack of surety and there is no doubt that with Abramovich leaving and the Boehly project coming in, there is no danger as such, but there has been everything but stability. In fact it has been absolute madness in terms of every department I the club changing.

"They just need to stop. I sometimes say this in my own life, if you feel like you're spinning around too fast, sometimes you just to need to jump off and not really do anything, and just stop and sort of let people continue and just let things slow down.

"It must be like that at the moment for Pochettino, and the players, and the fans - not knowing who is going to play from one game to the next.

"When you have that type of project, and it looks a little bit mad, and it doesn't really look co-ordinated - I know they have signed a lot of young players on long contracts, but it does seem like it is something that I am not sure about.

"Mr Pochettino is someone I have great faith in as a coach, as I do Erik Ten Hag, I think he is a fantastic coach, so I think both clubs are going to have to let their managers just work it out over a period of time.

"For both clubs, I think it is going to take a little bit of time because there is no doubt that Chelsea are nowhere near, and United are in the same boat."

What's next for Chelsea?

Chelsea's next outing is at home to Aston Villa on September 24 - kick-off 2pm. The Blues then host Brighton in the Carabao Cup on September 27 - kick-off 7.45pm.