Chris Smalling is adamant Manchester City will "crumble" if Manchester United's relentless pursuit of the Barclays Premier League leaders continues much longer.
Smalling helped United secure a vital 2-1 victory at Arsenal on Sunday hours after City moved six points clear of their arch rivals with a last-gasp win against Tottenham.
The defender said: "Soon enough, if we keep ticking these wins then they'll crumble."
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