Viktor durasovic

Beatriz Haddad Maia: Defending champions Germany kicked off their United Cup campaign with a win as Alexander Zverev produced a sharp opening performance on Sunday to steer Germany to victory over Brazil in Perth, capitalising on teammate Laura Siegemund's crucial upset win earlier in the day.

World No. 2 Zverev defeated Thiago Monteiro 6-4, 6-4 in just one hour and 17 minutes, in contrast to Siegemund's gruelling three-set win over Beatriz Haddad Maia in the first match of the day as Germany took a 1-0 lead in their Group E tie at the RAC Arena.

The 23-time ATP Tour title winner Zverev served 11 aces and dropped just three points on his first serve (29/32), according to Infosys ATP Stats.