Niang applied the season-salvaging finish in the third minute of stoppage time in the 2-1 win at home to Roma.
Pep Guardiola has admitted that Jack Grealish has struggled to perform this season but expects the winger to improve again
Manchester City’s league-winning squad joined thousands of fans in the city centre on Sunday night to shake off the hangover from their 2-1 FA Cup final defeat to Man Utd the night before.