David Macpherson coaches John Isner and Bryan brothers to victory at 2018 Miami Open

The 50-year-old coached American John Isner to the men's singles title and his compatriots – Bob and Mike Bryan – to the men's doubles championships.

The big-serving Isner, who had 37 consecutive service holds and wins over top players Marin Cilic and Juan Martín del Potro, defeated world No.5 Alexander Zeverev in the final  6-7, 6-4, 6-4.

The 32-year-old Isner pocketed $1.3 million with his world ranking soaring eight places to No.9.

The Bryan twins, who turn 40 later this month, took down Karen Khachanov and Andrey Rublev 4-6, 7-6(5), and 10-4. The young Russians have just a combined age of 21 years.

“They were still in diapers when we first turned pro,'' Bob said.

The Miami Open triumph was the Bryan’s 115^th ATP title, most of which have been won during their 13 years years under Macpherson. 

Macpherson said that the men's doubles game had improved tremendously over the years, particularly in the power of the groundstrokes.

“So it' a tribute to Bob and Mike that are still able to match it with the best pairs, this late in their career,” he said.

This is the second occasion Macpherson has coached Isner and the Bryans to separate titles at the same tournament, however, coaching two different players does occasionally have its problems.

“At the recent Indian Wells tournament John and Jack Sock played Bob and Mike in the final of the doubles,” Macpherson said.

“I decided to stay right out that one and didn't give advice to either of them,” Macpherson said.