US sprint legend Michael Johnson has been working with Arsenal's players.

The USA great, who won gold at Barcelona 92, Atlanta 96 twice and Sydney 2000, was at the Hertfordshire base ahead of the Gunners' Champions League clash against Greek side Olympiacos on Wednesday night, says the Daily Mail.

The likes of Theo Walcott, Alex Oxlade-Chamberlaim and Carl Jenkinson will be licking their lips at the prospect of improving their already formidable pace, while giant defender Per Mertesacker could well do with listening in too.