Silva, 36, did not play in the 4-0 win over Krasnodar in the Champions League on Tuesday.
"Thiago is fit," Lampard told reporters. "Taking him out of the trip to Russia was more of a maintenance issue for him and I spoke to him about it.
"We're just trying to make sure we get the best out of him over the course of a season and in this schedule where we have game after game after game, it made sense [for him not to be involved] in a game which involved a lot of travelling.
"If he had to play that game then of course he could have done but we have to put it in context of what we've got ahead of us. In the end it was a nice exercise with the fact we got a result and Toni Rudiger came into the team and played really well, which is the competition we need."