Theo Walcott believes Arsenal’s penalty shoot-out win over Roma on Wednesday proved just what a “great unit” Arsene Wenger’s young team are.It was closing in on midnight at the Stadio Olimpico when the Gunners secured a place in the quarter-finals of the Champions League as Roma midfielder Max Tonetto blazed his spot-kick – the 16th of the shoot-out – over in sudden death.
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