Manchester United forward Alexis Sanchez admitted having failed to bring more joy to the Premier League club and their fans has left him worried.
Sanchez has struggled for form and fitness since arriving from rivals Arsenal in January last year, with the 30-year-old scoring just five goals as a United player.
Caretaker manager Ole Gunnar Solskjaer said he cannot help Sanchez after the former Barcelona star's disappointing performance in Tuesday's 2-0 first-leg loss to Paris Saint-Germain in the Champions League.
"He (Solskjaer) hasn't spoken to me a great deal about what I have to do on the pitch, but I think I'm an experienced player and I think I know what I need to do and what I shouldn't do," Sanchez told the BBC .
"I'm a player that, if I'm not in contact with the ball, I lose that spark, and sometimes I want to play in every game. You're in, you're out, and I'm used to playing.
"It's not an excuse because if I go on for 10, 20 minutes, I have to perform because that's what I'm here for, to make a difference.
"I would like to have brought more joy to the club. Yes, it worries me because I believe in my abilities as a player, I want to show it."
This will help you survive a weekend of football without #MUFC !— Manchester United (@ManUtd) February 16, 2019
The Chile international also made it clear that he still has the drive to perform at a high level.
"I don't know how people see me, but football is what I've loved from being a kid and it's my passion," Sanchez added.
Having underwhelmed after replacing injured team-mate Jesse Lingard on the stroke of half-time, the former Barcelona and Arsenal star admitted that he picked up a knock after an assistant referee ran into him while warming up during United's Champions League fixture against PSG, though he was quick to downplay the impact on his performance.
"The referee's assistant, when we had a counter-attack, came flying down the line, and I had my foot there and he crashed into me. Bang," Sanchez said.
"And I went back to the dugout and I said to [reserve goalkeeper] Sergio Romero: 'I've just been whacked and I'm about to go on'. I've got bruising but that's not an excuse for not being on my game in the way that I normally am."