Brennan Johnson has lauded former Tottenham Hotspur man Kyle Walker as an ‘unbelievable’ defender. Speaking to Spurs Play, the Tottenham winger reflected on facing off against the Manchester City star on Sunday. Spurs picked up a hard-earned point at the Etihad Stadium thanks to goals from Son Heung-Min, Giovani Lo Celso and Dejan Kulusevski. Ange Postecoglou’s men left it late to earn a draw as Kulusevski netted with a brilliant header in the 89th minute. Brennan Johnson started on the right-hand side and put in yet another promising display. The Welshman was moved to the opposite flank in th…