Saracens expect to know on Monday whether their captain, Steve Borthwick, will be able to play in the Heineken Cup and Premiership finals after suffering a shoulder injury during Saturday's play-off semi-final victory against Harlequins at Allianz Park.

Borthwick, who is retiring at the end of the season and expected to link up with the Japan coach, Eddie Jones, before next year's World Cup, left the field 12 minutes from the end after helping keep his side on course for a league and European double.

They face Toulon in the Heineken Cup final in Cardiff on Saturday before taking on Northampton for the Premiership crown seven days later. The Saracens director of rugby, Mark McCall, said he did not know if the former England captain Borthwick would be available for the matches.

"I hope Steve is OK," he said. "His career does not deserve to finish now, but in two weeks. He has a problem with his shoulder, but we will not know the extent of it for a few days. We will be guided by our medical staff."

Saracens are contemplating the double 12 months after being knocked out of Europe and the Premiership at the semi-final stage. "We have come on a lot since then," said McCall, whose side trailed 17-11 at the interval against Harlequins. "The players are more mature and experienced."

Conor O'Shea, the Harlequins director of rugby, conceded that the better team won. "We gave it our best shot but ran out of puff," he said. "I am unbelievably proud of my players, but Saracens and Northampton have been the two best sides in the Premiership and it should be a humdinger of a final."

O'Shea said that the England full-back Mike Brown, who left the field 12 minutes from the end with a leg injury, would be assessed on Monday. "It's a twinge, I hope, nothing more, but we will see after the next couple of days. He has got a few weeks until that first Test in New Zealand. Hopefully, he is all right."