Hayes had demanded a more relentless performance by last season’s runners-up in the competition and was rewarded with a devastating attacking showing that brought six first-half goals and ended with the Swiss failing to muster a shot on target.The shut-out ensured our first clean sheet in Europe this season, while a wonderful night also had an emotional first appearance for Maren Mjelde after eight months out with a knee injury.We led early on through Melanie Leupolz’s fierce strike, Fran Kirby and Sam Kerr both grabbed doubles for a 5-0 lead inside 26 minutes and further strikes from Jessie Fleming and Guro Reiten completed the scoring.Hayes said the explosive start to the game and the ‘way we maintained a high tempo’ was key.‘There was a lot of good movement and I felt the rotations and all those things worked really well,’ she added.

‘The details in the pass, the movement, the finishes, the execution of every action - it could have been 7-0 at half-time. And we missed chances.‘Credit to the players. They decided they wanted to go up a level. It is my job to put the challenge to them. We were outstanding.’Hayes was just as delighted to welcome back Norway captain Mjelde, who returned as a substitute having not played since being injured in the Continental Cup final in March.‘This is a special person in our environment. The work she has done and the work the medical team and my technical team have done with her…it was emotional for her,’ said Hayes.‘She is a Rolls Royce of a footballer. When she came on there was composure and I said to Jess Carter to watch her, look at her decision-making in possession and out of possession. She is a superb football player and we're delighted she is back.

‘She is a quiet leader and has been the mother hen of this group for several years. The ability to read things you can’t teach.‘She has been involved in this team in several positions and has an innate ability tactically and an awareness to drop off in the right situations but also in possession she will give the team a lot. Maren is one of the most under-rated players in the world.’

Hayes made seven changes from the side that beat Aston Villa 1-0 on Saturday, but Denmark striker Pernille Harder was not deemed ready to return and recent signing Lauren James did not appear off the bench.Hayes said Harder ‘wasn’t quite ready’ after a muscle injury.‘We just need to get everything right for the weekend and hope that everything is ready,’ Hayes explained.

‘It’s important that we give Lauren time and also when we have a squad of players and some have not played a lot, you have to put the time in.‘I want Lauren to be given the time in the training environment to get up to the speed of the team and give her some exposure at the right minute.‘I will never, ever do anything at the expense of what’s best for the team. She is not far away but she has to keep earning it on the training pitch.’The victory means we are two points clear at the top of group A at the halfway stage of this season’s Champions League having beaten Juventus and drawn with Wolfsburg in our opening two games.Servette travel to Kingsmeadow for the return fixture next Thursday. Before then we have an away game against Manchester City in the WSL on Sunday.