Chelsea winger Christian Pulisic admits he is growing frustrated at the lack of first-team minutes he is receiving under Frank Lampard.
The 21-year-old has been an unused substitute in four out of Chelsea's last five matches in all competitions, with his only on-pitch minutes coming in the Carabao Cup win over Grimsby Town.
The USA international, who initially signed for Chelsea in a £58m deal from Dortmund in January, says he will continue to work hard in training in an attempt to impress Lampard.
"Yeah, of course, it is very frustrating, but I will continue to work my hardest because I want to play," Pulisic told NBC Sports after Saturday's 2-0 win over Brighton.
Pulisic says the Chelsea head coach has not offered him specific advice on how to claim a first-team spot ahead of team-mates Mason Mount, Willian, Pedro and the returning Callum Hudson-Odoi.
"Not so much," Pulisic revealed. "He said to keep working and I have to improve myself in training and try to get back in the line-up.
"It is not going to be easy here, but it was never going to be easy."