“We also need to make some tactical changes but there’s no guarantee that our play will become much better.”
Arsenal’s Henrikh Mkhitaryan, who hurt his knee in the first leg, is out injured but Gancharenko knows his absence won’t lessen the size of the challenge that stands in front of CSKA.
“Arsenal have a big number of players. They can substitute Mkhitaryan with a very skilled player though it’s very hard to make a worthy replacement,” he said.
“But anyway it will not make our task easier. Arsenal and Atletico (Madrid) are the main Europa League favourites.”