Spartak Moscow are heading to Anfield looking to end Liverpool's Champions League return in the group stages - and club doctor Victoria Gameeva has a trick up her sleeve to help the players silence the Kop.
She has banned Spartak's team from having sex in the days leading up to the match against Jurgen Klopp's side.
'From a medical point of view sex stimulates the ability to work only in women,' she is quoted as saying in an interview with Russian TV.
'In martial arts it happens that a female athlete could fight just five or ten minutes after having sex and her results would be better.
And Gameeva may well have extra motivation to encourage Spartak to get one over on Liverpool, having previously posed in a Chelsea shirt on her Instagram account.
Liverpool are top of Group E with nine points from five games but are still to confirm their place in the knock-out stages.
A draw will take Liverpool through but a win will confirm their place at the top of the group and in turn heighten their chances of a more favourable last-16 draw.
For Spartak and Gameeva to progress, they need to win to advance at Liverpool's expense. Their head-to-head record would mean Liverpool would drop into the Europa League.