Carlos Alcaraz, Jannik Sinner, Daniil Medvedev and Iga Swiatek all secured wins at the Hard Rock Stadium on Super Saturday at the Miami Open.
Aryna Sabalenka claimed a straight-sets victory over Paula Badosa to progress into the last 32 of the Miami Open days after the death of her former boyfriend Konstantin Koltsov.
Andy Murray secured a place in the second round of the Miami Open after beating Matteo Berrettini.
Simona Halep has hit back at Caroline Wozniacki after the Dane said she should not have been given a wild card for the Miami Open.
In her first match after serving out a nine-month doping ban, former world number one Simona Halep went down in three sets to Paula Badosa at the Miami Open on Tuesday.
Emma Raducanu's representatives have assured that the back injury, which forced her withdrawal from the Miami Open, is "nothing serious".