The former Sheffield Wednesday man goes into the penultimate game of the campaign, at Ipswich Town on Saturday afternoon, with 14 Championship strikes to his name after last weekend's double at Blackburn.
Assombalonga, with whom Antonio struck up such a good partnership at the beginning of the season, had 15 goals from 29 appearances before injury ended his 2014/15 prematurely.
Former Reds defender Luke Chambers will look to stop his old club from scoring on Saturday as Ipswich aim to secure their top-six spot.
Writing in the matchday programme for the Portman Road clash, he said: "There's nobody who will want to be in those end of season Play-Offs more than the lads in this dressing-room, that's how hungry we are as a team to be successful together at this Club."