According to popular stats site WhoScored, Tshibola had 47 touches during the second-half while the two men who made way in the heart of the midfield, Westwood and Gardner, had a combined nine touches of the ball.
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Westwood made two passes in the 45 minutes he was on the field, whereas Gardner only made four - completing three of them.
Villa have been consistently linked with Conor Hourihane, who would be available on the cheap with his Barnsley contract expiring at the end of the season.