Northampton Saints wing Vasily Artemyev says they will have to take what positives they can from the Heineken Cup defeat by Scarlets.
Artemyev told BBC Radio Northampton: "Things can go really wrong if you don't get the right attitude.
"Losing at home is a very big shock for all of us. But it will make us stronger and maybe it's a wake-up call."
The Russian international added: "It's better to get it at the early stage than when we're fighting for a place in the play-offs.
"With the good defence that Scarlets showed, we were over-doing things and [trying] something extraordinary rather than doing what we do best.
"It gave them the ball and the chance to play off our errors. It's one of those you have to analyse and then put behind you."
Artemyev, who joined Saints from VVA-Podmoskovie in the summer, denied that the speculation linking director of rugby Jim Mallinder with the vacant England manager's role had affected their preparation or performance.
"He is fully committed to the team and the club. The job he's doing here is awesome and there haven't been any talks about him possibly working with England."