I also came across the news that this tournament in Argentina is a farewell for Del Potro and that it will be the last tournament of his career.
Source: https://www.bbc.com/sport/tennis/60273217
Realistically, probably similar news, about the end of a great career, we can expect for Murray soon.
It is a pity that in this way, due to injuries, we lose two great tennis players who played together with the big three, Federer, Nadal and Djokovic, and still achieved great tennis results.
Who knows where Murray and Del Potro would be now if only the injuries hadn't stopped them.
Yeah I also read it, too bad! Del Potro was a top player and I always liked to watch him. He is only 33 but his body has decided it's over. Chances do exist that Murray will also retire soon, but on the other hand Murray just loves the game and can still play on a decent level.