Janko Tipsarevic saw off world number 93 Bradley Klahn in straight sets on Wednesday for his first tour-level victory since August 2017.
Daniel Dobre will serve as Simona Halep's new coach after the French Open champion split from Thierry Van Cleemput.
Rain wreaked havoc in Miami, where the WTA schedule was washed out on Tuesday.
After missing out on the Australian Open due to injury, Lucie Safarova will play her final tournament at the Prague Open in April.
Bianca Andreescu has been described as a "student of the game" by her former coach Andre Labelle - and she has notes to prove it.
Andre Labelle says the "driven" Bianca Andreescu can go from strength to strength after making history at Indian Wells.
Knee injuries have prevented Juan Martin del Potro and Rafael Nadal taking their place in the draw in Miami.
New Indian Wells champion Dominic Thiem says his triumph over Roger Federer in California felt "unreal".
Bianca Andreescu was in disbelief after defeating Angelique Kerber at Indian Wells, securing the teenager her first WTA Tour title.
Roger Federer believes Indian Wells Masters champion Dominic Thiem is starting to realise his obvious potential.
Sofia Kenin was the last player to beat Bianca Andreescu, but she was no match for the teenager on Friday.
Petra Kvitova and Caroline Wozniacki continued their runs at the Miami Open.
Bernard Tomic saw off Thiago Monteiro in straight sets to set up a showdown with Novak Djokovic in Miami.
Defending champion John Isner battled past Lorenzo Sonego in the Miami Open second round.
Sloane Stephens' difficult year continued with a surprise Miami Open loss to Tatjana Maria.