Tuchel took aim at the frontman after the 1-0 defeat at Manchester City, having criticised him for surrendering possession cheaply. Lukaku also squandered his side's biggest chance in the second half, their only shot on target.
And when questioned on how the team can do more to aid the £98million signing out of his slump, the manager hit back, declaring that it would be 'wrong' to place focus on just one of his stars.
"We do everything to help him," Tuchel said in his Brighton pre-match press conference today. "It is absolutely the wrong question because it is focusing on one player.
"He is a key player and we want him to be a key player but this is for me the wrong approach."
He then went on to add: "This is what we do by the way constantly, for any player.
"It's a team sport, not about ten players serving one player. This is not Chelsea or football. Every player serves one team, this will never change."
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