we will have RG as last grand slam this year, since it is delayed for the end of September, from 20nd till 4th of October, just one week after US Open, it clashes with Laver cup, but there was not other spare dates, and French federation do not want to cancel it
since Laver cup is promoted by Nadal, he could miss RG due to his contract obligations, so tournament will be without the king, doubt that it will happen, but RG decided new dates without consultation
https://www.theguardian.com/sport/2020/mar/17/french-open-tennis-postponed-until-late-september-due-to-coronavirus
Ok, but the schedule is messed up right now, one week break for tennis athletes though is nothing so I guess they can re-adjust with the grueling schedule this year. I think we will see minor tournaments being cancelled totally this year, to give way to bigger tournaments of them all, the Grand Slam.
I think Nadal has no choice but to go with Laver Cup, but let's see how it goes, maybe tournaments official will have to work out so that there will be no conflicting schedules.
I can’t believe how messed up the schedule has got as players will barely get time to recover, and many players will now have to play in selective tournaments only to keep themselves fit, which will dilute the competitiveness in these tournaments. As far as Nadal is concerned we will have to wait and see what he chooses, but I don’t expect him to participate in both the tournaments due to the various injuries he has suffered in the past, therefore he’ll be forced to play in limited tournaments only.
Read More: https://www.express.co.uk/sport/tennis/1231280/Rafael-Nadal-injury-2019-Australian-Open