British and Irish Lion Billy Twelvetrees insists club side Gloucester must cut out their disciplinary errors if they are to succeed in their upcoming European semi-final.
The England centre, who represented the Lions twice on the triumphant tour of Australia in 2013, featured as the Cherry and Whites went down to 13 men in the final 12 minutes of a 29-26 defeat to Harlequins.
That pair of yellow cards proved crucial to the outcome, with Gloucester conceding 12 points while Charlie Sharples and Ross Moriarty sat in the bin, having previously led 21-17.
And 26-year-old Twelvetrees admits his side cannot afford to repeat those mistakes when they clash with English rivals Exeter Chiefs in Europe next weekend.
“It’s a case of building momentum and keeping the scoreboard ticking over and we did that to a certain extent, but then our discipline let us down,” the Lions back said.
“Going down to 13 men is always difficult and we couldn’t quite hold on.
“Discipline will be massive next week. It let us down in crucial moments against Harlequins and it will be spoken about this week.
“We have to keep believing that we are a very good team and we’re not far from performing very well on a week in, week out basis.
“There’s no bigger game this season than next week – we’re at Kingsholm in a semi-final.”
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