Nadal carries the flame for the fading golden generation as he bids for a 23rd major title and third at Melbourne Park.
All judges scored the fight 96-94. Efe Ajagba now moves to 17-1.
Organisers confirmed the immediate rematch.
Chelsea, who have struggled to hit the ground running this season, are looking to bolster their attacking options.
Saturday defeat leaves City in second position with 39 points, one ahead United and five points behind Arsenal.
Liverpool suffered a 3-0 defeat to Brighton in the English Premier League on Saturday at the Falmer Stadium.
The Super Eagles forward put Napoli upfront in the 14th minute with a header from a Khvicha Kvaratskhelia rebounded overhead kick.
Mendy was found not guilty of seven counts allegations of rape, kidnapping and sexual assault brought against him by prosecutors in the UK.
Quadri Aruna is through to the 2023 World Tennis Tennis (WTT) Contender championship quarterfinals in Durban.
Joao Felix’s debut for Chelsea ended in a nightmare following a second-half red card as the Blues continued their league’s poor run.
