With Mateo Kovacic ruled out this weekend with a troublesome knee injury, there could be the opportunity for more midfield minutes for Gallagher, who made his senior debut for the club as a substitute at Everton.
"Conor fights in central midfield," said Tuchel. "To be very honest, it's a tough fight for him because at the moment we only have two places in central midfield, which is a bit unfair given the amount of players we have there.
"It's not ideal but we have to do what's best for the squad and not only best for every individual player. These thoughts about the formation and how to use everyone are not 100 per cent finished yet, but at the moment he's absolutely fine.
"I'm a huge fan of Conor, he's first of all a fantastic guy, which we knew, and in the first weeks of training he showed how much of a step he made by having so much playing time and how much of a personality on the pitch he became.
"It's a very normal situation in development that after some really fantastic training sessions in the beginning there is now a little dip in form and freshness from which he suffers.
"Then on top he has huge competition with N'Golo, Jorgi and Kova who are used to playing with each other but this is also life in a big club like Chelsea. Everything is in its right place and we are happy with him. He keeps on fighting because this is what he does. I think he has everything to become a very important player over the next years at Chelsea."