Pep Guardiola believes Manchester City's 1-1 draw at Southampton epitomises the difficulty of defending the Premier League title.
Reigning champions City were unable to stretch their winning run to 13 top-flight games after being forced to come from behind at a boisterous St Mary's.
Aymeric Laporte's 65th-minute header cancelled out a shock early opener from Saints defender Kyle Walker-Peters.
But the runaway leaders could not find a winner as they dropped points for the first time since late October, leaving them 12 above second-placed Liverpool, albeit having played two games more.