(Reuters) - Tottenham Hotspur manager Ange Postecoglou is focussed on his team's progress, not motivated by damaging Arsenal's Premier League title challenge, the coach said ahead of Sunday's north London derby.

If the hosts defeat Arsenal, who lead in the standings by one point over Manchester City, they can prevent the Gunners opening up a four-point lead at the top. City face Nottingham Forest on Sunday with a game in hand.