Several notable players won't be taking part in the first edition of the
United Cup such as Alcaraz, Djokovic, Gauff, Raducanu and Murray.
The event will replace the ATP Cup in the calendar this year as the mixed teams' format makes the return. It was popularized in the past as the Hopman Cup and it will make a return this year with a superb format featuring 18 nations.
Novak Djokovic won't be there as he still doesn't know whether he can enter the country but also Serbia is not taking part anyway.
Emma Raducanu and
Andy Murray are not playing which is somewhat strange as they both expressed interest in playing together.
Coco Gauff is not in the US team with
Carlos Alcaraz not being in the Spanish team despite Nadal signing up for the event. Check out the full rosters below.