Errors from two full-backs marked a forgettable evening for a much-changed Spain team, as La Roja fell 2-0 to Scotland.
Pedro Porro made the first mistake, easily ceding the ball to an advancing Andy Robertson, who fed McTominay for a 1-0 Scotland lead inside 10 minutes.
La Roja did show some fight for the remainder of the first period, with Joselu rattling the bar and Porro forcing a diving stop out of Angus Gunn.
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Then, a second error doomed the Spanish. Dani Carvajal was barged off the ball by a surging Kieran Tierney, whose angled cross deflected into the path of McTominay to hand the home side a 2-0 advantage — an unassailable deficit for Luis de la Fuente's side.
GOAL rates Spain's players from Hampden Park...