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Robert Sanchez joined Chelsea from Brighton for £25m in 2023 Chelsea head coach Liam Rosenior says goalkeeper Robert Sanchez was "really disappointed" to be left out of Wednesday's match against Aston Villa, but stressed he does not have an established number one. Spain international Sanchez was criticised for both his distribution and errors at set-pieces during Sunday's 2-1 defeat at leaders Arsenal. Rosenior brought in Denmark's Filip Jorgensen - Sanchez's long-term understudy - for the 4-1 victory at Villa Park. "I've been really honest with Rob, " he said. "He was really disappointed not to play, which is what I expect from every player, whether they're a goalkeeper or an outfield player. "But the way Rob responded in training, the way he supported Filip - in the warm-up, in the dressing room - was magnificent. " Chelsea have a long-term strategy of encouraging squad rotation, and Rosenior intends to apply that principle to his goalkeepers too. "For me, genuinely, I look at the goalkeeper position differently for each game, " he said. "I want there to be competition in every area of the pitch. "I know, traditionally, if there's a change of goalkeeper, people assume he's now the number one. That's not the case. We will pick - and I will pick - the best team for each game. "Filip hasn't been waiting - he's been working for his opportunity. I thought he took it really, really well. But Rob has put in great performances as well. " Rosenior was asked whether goalkeepers need continuity and whether rotation could therefore be counterproductive. "Yes, you need continuity - but you also need to win football matches, " he said. "There are different approaches - modern or old‑school. "I will pick the team I think is best to win each game. I don't think I've kept the same XI once since I've been here. People can say you need continuity - if we lose, it's because we didn't have enough; if we win, it's the right decision. "I made a decision for the Aston Villa game that I think was proven correct. Hopefully, I'll make more correct decisions moving forward. " Chelsea face Wrexham in the FA Cup fifth round at 17: 45 GMT on Saturday, with the match live on BBC One and BBC i Player. Latest Chelsea news, analysis and fan views Ask about Chelsea - what do you want to know? FA Cup: Team news & build-up as Liverpool visit Wolves in fifth round Six Nations: Build-up as Ireland face Wales in Dublin Who's to blame for Spurs crisis? Jessie Buckley on The Bride! and Oscar nominated Hamnet The Nations Pod Guide puts Rome in the centre The Mitford sisters refuse to play by the rules The highlights of Piano Room Month 2026 with Vernon Kay Disillusionment and disbelief - thousands leave early with Spurs in freefall 'Howard Webb, where are you? ' - How we can stop VAR ruining football India reach T20 World Cup final as England fall short. Video India reach T20 World Cup final as England fall short Norris, Verstappen, Russell - and will it be any good? Key F1 storylines How relegation could cost Spurs more than £250m 'Brave and brilliant, Russell has compelling case as Scotland's greatest' Mc Cullum wants to stay as England coach – will he get the chance? How Old Firm cup tie could provide Premiership momentum 'Only one team tried to play' - Hurzeler criticises Arsenal Meet GB's first female Paralympic snowboarder Watershed moment as Russia's sporting exile ends All you need to know about new F1 cars Haaland? Kane? R9? Ranking the best centre-forwards this century 'I cheated head-injury assessment to play on in 2017 Lions Test' 'I knew the risks, I'd do it again' - Moody opens up in new BBC documentary New era of Formula 1 - what is changing in 2026? 'There were tears - but I had to peek behind curtain of head injuries in rugby' Iran, the US, and a World Cup that starts in three months Copyright © 2026 BBC. The BBC is not responsible for the content of external sites. Read about our approach to external linking.