Mourinho reckoned Lampard picked the wrong players and claimed the Blues did not even do the “basics". He also accused his old team of being “too soft" and “not aggressive" enough.
Lampard said: “I don't have to be too concerned about what anyone else says, the pundits, but what is clear is the squad is the squad we've got and I believe in it.
“I can't drag people out of the medical room, whether they're experienced or not. The players we played today, and on the bench, are the players we have.
"We were missing internationals and big players, but I don't want that to be an excuse. We were competing for long periods.
“We made four mistakes and they put them away. It is a reality check for us all. It wasn't a 4-0 game for long periods, but we need to accept it."