Nick Kyrgios overcame early back spasms to get the better of Russia's Daniil Medvedev in a pair of tiebreakers and win the Citi Open in Washington on Sunday.
Reigning champion John Isner twice fought back to end Canadian teenager Felix Auger-Aliassime's run at the Miami Open with a 7-6(3) 7-6(4) win in the semi-finals on Friday.
David Ferrer is set to retire from professional tennis in May but the Spaniard showed he still has the tools to bring down the biggest names in the game after a stunning 2-6 7-5 6-3 win over world No. 3 Alexander Zverev at the Miami Open on Saturday.
Roger Federer rallied from a set down to beat Moldovan surprise package Radu Albot 4-6 7-5 6-3 in a stuttering start to the 20-times Grand Slam champion's Miami Open campaign on Saturday.