VIDEO: Hull KR boss Tim Sheens says club are "concerned" for hospitalised Joel Tomkins

Hull KR's Joel Tomkins in action against Warrington Wolves today before suffering a serious concussion. (SWPix)

Hull KR head coach Tim Sheens revealed Joel Tomkins was "in a bad way" in hospital after his captain suffered a severe concussion during a controversial moment in their 28-14 Betfred Super League defeat at Warrington Wolves.

Former dual-code England star Tomkins, 31, was on the receiving end of a hefty challenge from Blake Austin while lying on the floor during the first half at the Halliwell Jones Stadium.

The Australian stand-off - a 'marquee' signing from Canberra Raiders this season - was sent to the sin-bin by referee Liam Moore and Sheens believes it could warrant further action from the Match Review Panel on Monday.

"Joel's in hospital at the moment - and Joel Tomkins doesn't go to hospital unless he's a sick boy," said the coach.

"He's gone in an ambulance, he's in a bad way and we are concerned for him.

"I think the player concerned may a have a little worry this week but it doesn't help us.

"Although in the 10 minutes he was off we scored a try.

"It's a tough one for referees because he doesn't know he's hit him that hard he has put him in hospital.

Warrington's Blake Austin on the attack before his yellow card. (SWPix)