The 40 year old is using the club's London Colney complex to keep up his fitness levels, having left Aston Villa at the end of the 2010-11 season.
"He practises with the young players with the under-21 team and I feel always there is no better education than playing with players at that age with top-level players," Wenger explained.
"We are always happy to have him in training, but just occasionally he comes in to practise. Robert Pires will not join us, he was born in 1973, but he is still very fit."
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