Chelsea boss Thomas Tuchel admits Tammy Abraham is struggling to impress him.

The 23-year-old is the Blues' highest goalscorer this season with 12 goals in 30 appearances but has battled to make Chelsea's matchday squad since returning from an ankle injury.

"I cannot make a decision on the personal goals of players," Tuchel told reporters on Friday. "Kepa [Arrizabalaga] has the goal to play for Spain but this can't influence my decisions.

"I've got to do what I believe is best for Chelsea. Tammy has had a rough time. He started twice or three times and substituted for tactical reasons at half-time.

"He's not had the impact we wish and demand from him. He then got injured, lost the connection and possibility to play for his place the squad.

"Now suddenly we're in the decisive part of the season, where it's not so easy to bring injured players into the shape. We've only got three changes and a big handicap.

"It's up to Tammy to do everything possible. We have 22 players on the pitch and it's very hard to select 18 for Premier League matches.

"In the offensive position it's possible to have a huge impact in small minutes. We demand a lot of Tammy, he demands a lot of himself."