Barcelona superstar Lionel Messi confirmed as investor in revamped Davis Cup
Football superstar has backed team-mate's project.
EXCLUSIVE: Mariano Zabaleta on Davis Cup, Lionel Messi, and Manchester City
Tom Victor talks exclusively to Mariano Zabaleta.
Tennis Today: Serena Williams to launch beauty brand, Andy Murray return revealed
In Tennis Today: Serena Williams keeps on impressing.