After Chelsea's 1-0 Champions League victory over Zenit St Petersburg, Thomas Tuchel has praised Romelu Lukaku's "world-class" opportunity conversion rate.
Lukaku buried captain Cesar Azpilicueta's dangling far-post cross with an inch-perfect header to pull Chelsea out of a tight game and clinch a crucial victory at Stamford Bridge.
"The cross from Azpi was very, very good and dangerous, and difficult to defend," said Tuchel.
"The target was the far post, for Romelu, and Kai (Havertz) was also there. It was the opening, and at the same time, decisive goal which is very, very good for us of course.
"We did not create many chances for Romelu, but he's the type of guy who does not lose confidence or belief and that's why he's here, and that's why he's a world-class striker.
"It's super hard, and super important to be able to do that. It's as easy as that. You don't find many strikers of that quality.
"The guys who are there to score and really score regularly are so, so important. There aren't many goals in football and the goal changes the whole momentum of the match.
"It gives the whole team belief to know that one chance is enough. It's more than only just talent that he brings; he brings belief and he takes pressure off others' shoulders.
"He has the personality not to be impatient or to lose confidence. He does what he does and we're very happy he's with us."
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