Mertens previously worked with Simon Goffin, and will work with Dehaes through the North American summer hard-court swing.

Catch up with the dramatic finales of the men's, women's, and mixed doubles championships at Wimbledon, and where the top teams play next.

The Belgian reached the fourth round at the Australian Open, French Open and Wimbledon this season, but hasn't gone beyond the quarterfinals in any singles event.

Top 5 seeds have been falling at the All England Club, and the three in action on Sunday will receive stiff fourth-round tests.

As the defending champ prepares to face a fellow Serbian and the 2018 champ eyes a wide-open section, can Carlos Alcaraz dodge an upset bid from a tricky grass-courter?

Will the defending champions retain their titles or is another Slam surprise in store? Doubles Take looks at the year's third major.

Also lifting the trophy in Paris was Jean-Julian Rojer, who became the oldest men's doubles winner in the Open Era, partnering Marcelo Arévalo.

The American teenager is into her second major quarterfinal and her second in a row in Paris, winning the final eight games against her Belgian opposition.

Both defending champions have already proven they don’t need confidence-boosting wins or sustained momentum to conquer Paris. But in the meantime, a number of teams have established themselves as strong contenders during the clay season.

Top seeds have already fallen and the action is just getting underway in the California desert.