While Lampard is fit again, Mikel John Obi is also back in contention after international duty and Chelsea's other African stars such as Didier Drogba and Michael Essien return next week.
But Grant said: "We proved that we can do without them all.
"In the last three months everyone gave their share and the players who came in showed they could do it. It will be a good competition between everyone. We miss all the players, Frank, JT, Drogba, Kalou.
"But again, we must say that we've done well without them too.
"We will find a place for everyone. Frank trained the last two days and is feeling much better. We will decide today if he will play.
"John Terry also started training on Friday and should be back in three weeks. It's good news but for us every player who comes back is good news."