Which among the following tennis tournament was replaced by the ATP (Association of Tennis Professionals) World Team Cup after 31 years?

The unique mixed teams Hopman Cup (Tennis tournament) in Perth has been replaced by the ATP (Association of Tennis Professionals) World Team Cup after 31 years.Now three cities Sydney, Brisbane, and Perth will host the new men-only tournament (ATP World Team Cup) final.The ATP world team cup will be played from 3rd January for 10 days in the lead-up to the Australian Open, the first Grand Slam of the year, which will start in 2020.Hopman Cup was named after Australian tennis player Harry Hopman. This year Swiss pair Roger Federer and Belinda Bencic won the Cup.