Son Heung-min scored twice following a difficult few days to take Tottenham towards the Champions League knockout stages by thrashing Red Star Belgrade.
Spurs lie second in Group B, four points clear of Red Star in third, knowing one victory from their final two games will ensure progression to the last 16.
Forward Son, who was left “devastated” by his foul that led to a horrific ankle injury for Everton’s Andre Gomes on Sunday, netted twice in the second half, lashing home a finish from an angle and tapping in from close range.
The South Korean did not celebrate his first goal; instead he clasped his hands and bowed his head.
Mauricio Pochettino’s side went ahead in the first half courtesy of the impressive Giovani Lo Celso, who clipped home a finish on his first start for the club following an almighty goalmouth scramble in which Spurs hit the post and bar. Christian Eriksen added a fourth late on.
Red Star had chances of their own but could not find a way past Paulo Gazzaniga, with the Spurs goalkeeper saving sharply off Milan Pavkov and Rajiv van La Parra.
It was Spurs’ first away win since their thrilling Champions League semi-final comeback against Ajax last season.