Photos: Two teenagers try to keep up with Bellerin in Arsenal training, whilst Mertesacker and Arteta race

The Gunners were in training ahead of their tie with West Brom this weekend.

Hector Bellerin has been something of a revelation for Arsenal this season. The Spanish defender has become the first-choice right-back at The Emirates and left Mathieu Debuchy in the cold and Carl Jenkinson sent away.

One of his key assets is his blistering pace. Now considered to be the fastest player in the Premier League he has seemingly taken the crown from Theo Walcott at Arsenal.

However that does not mean that players won't try beating him in a race.

Arsenal take on West Brom this weekend and Bellerin seemed to be getting into a race with a couple of other young speed merchants at Arsenal - as Frenchman Jeff Reine-Adelaide and English hotshot Josh Dasilva both tried to outpace the full-back.

Whilst you can't see the winner Bellerin is already extending a lead and it is a safe bet he kept it to the line.

Meanwhile Per Mertesacker and Mikel Arteta kept it between themselves. Neither player is blessed with pace and this must have been the slowest race of the day at London Colney.

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