World number three Stefanos Tsitsipas finally got his Miami Open campaign up and running on Monday as he battled past Chilean qualifier Cristian Garin to book his place in the fourth round.
Carlos Alcaraz started the defence of his Miami Open title with a dominant straight-sets victory over Facundo Bagnis on Friday.
Carlos Alcaraz described Indian Wells as "the perfect tournament" after lifting the title and returning to world number one in the rankings.
World number one Novak Djokovic has withdrawn from the BNP Paribas Open in Indian Wells this week after failing to secure special permission to enter the United States.
Top seeds Carlos Alcaraz and Cameron Norrie both advanced to the semi-finals of the Argentina Open on Friday.
Jannik Sinner turned the tables on Stefanos Tsitsipas to claim the best victory of his career and reach the quarter-finals of the ABN AMRO Open in Rotterdam.