The Reds are sweating on the fitness of Wallabies winger Digby Ioane and fellow Test backs Ben Tapuai and Mike Harris for their Super Rugby clash against the Highlanders in Dunedin on Friday.
The Reds trio all has scans on Monday after they were injured in the team's 23-18 victory over the Bulls on Saturday at Suncorp Stadium.
Winger Ioane has a knee injury while inside centre Tapuai and utility back Harris both have hand injuries.
Reds Director of coach Ewen McKenzie said that sending the three players for scans was a precautionary move but he had to admit that there was doubt as to whether the trio would make the trip to New Zealand on Thursday.
On the positive side Reds winger Dom Shipperley has overcome his back problem and is available for selection so he could replace any one of the three if they are to be ruled out.
Reds captain James Horwill came through his first match this season on Saturday although he only played in the first half.
Just as the Reds did with Genia's return to Super Rugby Horwill is expected to brought back bit by bit and will play for an hour against the Highlanders.
Genia's reintroduction to Super Rugby has now been completed and he says that he is ready to put in an 80-minute performance following his knee reconstruction last year.
The Reds match against the Highlanders will be a historic one as McKenzie will become the most-capped Super Rugby coach at Forsyth Barr Stadium.
McKenzie is currently tied with Robbie Deans on 120 Super Rugby matches.