Rajeev Ram and Austin Krajicek also named to American team that will face Croatia in Split.
The World No.3 aired out her frustrations after a semifinal loss on Sunday in Montreal.
Alex de Minaur says Jannik Sinner has "some of the hardest groundstrokes I've ever dealt with." Sinner shares how he does it.
The pair of 17-year-olds took the big prizes at Kalamazoo and San Diego.
The Canadian hopes to recover in time for the US Open, but isn't sure of her timeline.
Paul and Pegula are the first pair of Americans to take down the WTA and ATP World No.1 in the same week since Roddick and Serena in 2008.
A pre-match ritual has helped Alex de Minaur break through to his maiden Masters 1000 final.
