Former England stars Rio Ferdinand and Joe Cole have laid into Timo Werner.
The German has struggled at Chelsea this season, and not scored as many goals as fans expected when he signed from RB Leipzig.
Werner played for the Blues in a 1-0 success over Atletico Madrid in the Champions League round of 16 first leg.
"It's just frustrating watching him because you've seen clips of him and you've seen what he can do," said Ferdinand on BT Sport.
"I feel like [his first-half miss] is not an easy chance but you'd like to see him get it on target and get a better connection on the ball.
"But he just frustrates you. There are far too many times where he's too loose in possession when building up or decision-making when he gets into [dangerous] areas.
"Sometimes fast players sometimes have to slow the game down in their mind. They're running so fast everything else is a blur, and that's maybe how he seems at the moment."
Cole added: "It was like a young Theo Walcott, wasn't it?"
"When you used to watch Theo play he was so exciting, so much talent, but it wasn't until the latter stages of his career when he put it all together and started scoring more goals regularly.
"We mustn't – and we're not – going to give up on Timo Werner, it's early days and there is so much scope there because he has got some natural, raw ability.
"But I reckon with good coaches – and he has got good coaches – he will start to kick on, but they just need to be patient with him."