But there is a fire in his belly - and it's exactly what Arsenal have been missing over the past few seasons.
Gunners right-back Hector Bellerin pointed out that Tierney had taken a second touch, but he seemed happy for the defender to stay on the outer circle. It shows that fire in the left-back's belly, which sparked excitement from former Arsenal hard man Martin Keown and prompted him to reveal that Tierney often shows heart in training.
Mikel Arteta is a big fan of Tierney, not just in aforementioned sense, but because he's a technically gifted player who offers so much down the left flank.
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