Studying classics at Oxbridge

So I'm currently studying maths, fm, French, Latin and Greek at AS. I either want to study classics or maths at uni. At GCSE I obtained 9 A*s and 2 As but one of those As was in Greek ( I just really screwed up the exam ). I studied a lot over the summer and Im on for an A* in Greek at AS. I got 100% in the Latin gcse and I'm on for an A* there too. Assuming I do get A*s in both Latin and Greek at AS, despite having these (and an interest in the subject), might Oxbridge be reluctant to accept me, both being unis keen on A*s, having only gotten an A? Thanks.