Abraham was injured after a collision with the advertising hoardings and the Blues are yet to confirm the extent of his injury, with Michy Batshuayi likely to deputise at the KC Stadium.
Lampard is no nearer to having answers to those questions, but he is hoping that the 22-year-old will not be stuck on the treatment table for long.
"We still have to see how he develops, it's not a clear-cut one".
Frank Lampard is keen for Chelsea to sign a striker in the January transfer window and confirmed that Tammy Abraham has not fractured his leg. "That is what football is, every player no matter how great you are in your career, the best, the absolute best of all time will get criticised and you have to deal with it". The recent games have shown that.
"When you're creating 20 chances a game and not scoring enough goals, that can be crucial".
"With Olivier [Giroud] it is the same situation". He's still our player.
"I think there's choice (in the transfer market)". It is about getting the choice right.
Outside of striking reinforcements, it has been suggested that Chelsea are among those considering an approach for highly-rated Lille midfielder Boubakary Soumare.
"I am not looking at it now", said Lampard.
Chelsea are keen to bring in more firepower.
Lampard insists that is not the case, but admits that his Spanish shot-stopper is facing a steep learning curve on the back of a few costly mistakes.
"Well he will have to deal with that", said Lampard. That's what being a footballer is about.
"There is spotlight on them".
"The important thing is not to get embroiled in what people are saying, not just Kepa but any player".
Kepa Arrizabalaga's form has been poor and Lampard, who is interested in Burnley's Nick Pope, indicated the goalkeeper had to improve after being asked whether he would try to strengthen that position this month.