Lawes was forced to pull out of the starting line-up after his knee became swollen following a midweek training session, with Northampton director of rugby Jim Mallinder suggesting he may face up to two weeks on the sidelines.

"He (Lawes) has got a bad knee, he did it a couple of weeks ago and missed the home game against Montpellier with it," said Mallinder, whose son Harry was also forced out of the action after picking up an ankle...