Clichy feels they've thrown away too much games this season.
He told the Daily Mail: "I don't believe they (United) have been better than us. But we have had games where we have been the best team but have not won. We have thrown so many games away.
"Showing what we showed on Monday, we can have regret because the quality is there. When we have the right spirit and focus from the first minute to the end, I am not sure who can really hurt us. It is only because sometimes we have lacked a bit of spirit.
"In England every team has quality and will fight so it's about being willing to hurt yourself and to fight for your team-mates.
"I'm not saying we don't want to fight for each other. We do. I say 'spirit' but what I mean is focus and desire and making sure you are not just at 100 per cent but at 110 per cent. Sometimes we were at 80 per cent and in England that's not enough."