Arsenal manager Mikel Arteta has compared Bukayo Saka and Granit Xhaka's ability to perform at left-back and has delivered his verdict on who works best in this role.The Gunners were forced to abandon plans to start the Swiss midfielder in their Europa League semi-final second leg with Villarreal after the experienced midfielder got injured in the pre-match warm-up.Saka was not selected in defence versus Villarreal meanwhile but started at left-back for the team in yesterday's 3-1 win over West Bromwich Albion.Arteta could be heard shouting instructions to the 19-year-old throughout the match as the Gunners' boss tried to advise the youngster on which positions to take up."B, second ball – go!" said Arteta as he encouraged Saka to make an.
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