But Rodgers believes his former club can cope with the demands of fighting in four separate competitions.
He said: "It is a tough ask but the one thing I'd say Swansea have which we did not have last year is a strong squad.
"Our squad was very thin last year and we were trying to operate on four fronts. You look through this squad and there is a strong squad here and some of the players have been here for a while and others that are new in.
"The Europa League certainly tests your squad. It will be a tough game against Valencia but I am sure Michael will want to do well in the competition, but then they come back and have got another tough game at the weekend.
"But I am sure they will cope. They have got a good squad and I hope they do well."
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