Dai Young believes the job is only half-done after his side produced a strong second half showing to beat Castres Olympique 32-17 in the European Champions Cup.

Wasps gave up only three points in the second period at the Stade Antoine Pierre Stadium as they kept their hopes of qualifying from Pool Two alive with the bonus-point success.

The win was the black and gold’s first in Europe this season following defeats in their opening two group matches, and Young is now keen to ensure they follow it up with another win in the return fixture on Sunday.

He said: “We knew coming into these two games that we would have to win both games in order to go into the final two pool games with any realistic possibilities.

“Obviously, we have to back up this result next week, which isn’t a foregone conclusion. But if we do front up next weekend, it will give us a real chance going into the final two games.”

The visitors had lost out to Leicester late on in their previous outing, but turned the tables on Sunday with two late tries adding a convincing edge to the scoreline of a very even contest.

Wasps had fallen behind with 13 minutes remaining – reminiscent of their narrow defeat at Welford Road last time out – but stormed back courtesy of a penalty try and a score from Sailosi Tagicakibau to ensure more late heartbreak was avoided.

Rob Miller had ensured the visitors made a flying start to the match when he collected Tom Varndell’s clever kick through before touching down with just five minutes gone. Wasps were also helped along by fly-half Andy Goode who kicked three conversions and two penalties en route to victory.

Young was also delighted with his side’s defensive effort, but was quick to sound out a note of caution ahead of next week’s fixture at Adams Park.

“Our defence was good, we said we needed to play the game in the right areas and when you get the opportunities you have to take them, and I think we did that a little better today.

“You don’t win games if your defence doesn’t muscle up and I thought we did today. The boys did a great job there.

“As I said, that was nowhere near the finished article for us today and there’s lots still to work on before another dangerous game next week, but we’ve got to be pleased with the result we’ve had.”