The Uruguay striker has been out since August with an Achilles tendon injury but was in line for a return to the matchday squad against Ipswich on Saturday until the game was postponed.
Moses Odubajo provided another boost to the Tigers squad by returning to training on Monday having missed the whole of last season and this with a knee injury. The full-back, though, remains some way from a playing return.
Fellow defender Ondrej Mazuch is ready to return and Markus Henriksen and the on-loan Harry Wilson have rejoined training but are unlikely to feature.
Millwall have been unchanged for the last four games and, despite being held by Sunderland on Saturday to end a three-match winning run, may well be so again.
Young winger Fred Onyedinma could be at the head of the queue for a call-up should manager Neil Harris decide to freshen things up.
Forward Aiden O’Brien remains doubtful but is nearing a return from an ankle problem.
Defender Byron Webster is out for the season with a knee injury.
Morecambe have no fresh injury concerns ahead of Tuesday's Sky Bet League Two home clash with Colchester.