Great Britain Lions look set to be without Luke Thompson and Oliver Gildart for the remainder of their tour after the duo suffered injuries against a Tonga Invitational XIII.
The Lions made their international return on Saturday but went down 14-6 in Hamilton in the first match of a trip that will also see them play New Zealand twice and Papua New Guinea.
Super League stars Thompson and Gildart came off against Tonga. Thompson, a Grand Final winner with St Helens, made way after just 12 minutes due to a rib injury, while Wigan Warriors centre Gildart later suffered a dislocated shoulder.
Coach Wayne Bennett said: "I don't think they will probably play again this series.
"We have got Jake Connor here [as cover]. I don't know [about calling up new players], I haven't checked.
"I'm happy with the squad right now. We can cover it - we've got the best players in England here. It's not panic time for us."
Bennett attributed the Lions' loss to a lack of patience.
"We have just got to pick up a bit with our patience and discipline with the football," Bennett said, quoted on the NRL website.
"[It is about] being patient - just believing, if you stay at it long enough, opportunities will come your way.
"Against these teams here, what you saw out there in the first half tonight is what you have got to be able to play week in and week out.
"If we can't do that, we can't be the team I know we can be."