Di Matteo played for Lazio during his career.
"Lampard is a great player and a great professional, so I am certain he can play at least another two years at the top level," said Di Matteo.
"I don't know if he will join Lazio or not, but it would certainly be a good choice for both parties. We often talk and I gave him my opinion. At the end of the day he will make the decision."