 World No.3 Casper Ruud of Norway, Germanys Alexander Zverev and Austrian No.1, Dominic Thiem will all be back in Davis Cup action as well as world No.3 doubles player, Rajeev Ram of USA. The possible Davis Cup debut of Swedens Leo Borg, son of Bjorn Borg, could also be one of the highlights of the ... The return of Ruud, Zverev, Cilic, Thiem and Ram, and a debut for... 