Tuchel said: “They are two key players for us, especially Mason for his offensive skills and his power offensive-wise to break the lines with dribbles and shots – but it is a small line between implementation and excuse.
“They are important players so far, but we have a group with which we compete so now is the challenge to adapt and find solutions, a way to play without the two guys.
“We also need to play without Thiago Silva and Tammy – there are no more injuries.
“So we miss four players that makes selection easy as we will choose 23 players and we will use our whole squad, five substitutes during the match and we have a clear idea of what we want to do and how we want to create chances.
“We are very aware Atletico give away fewest chances in Europe, it is very likely that we have to be patient, with intensity at the same time and keep this level constantly going, that is key for tomorrow.”
Chelsea predicted lineup:(3-4-2-1) Mendy; Azpilicueta, Christensen, Rudiger; James, Kante, Kovacic, Alonso; Hudson-Odoi, Werner; Havertz
Injury list: Thiago Silva, Abraham
Suspended: Mount, Jorginho