Coming to this very late obviously. But going back to the main point of this thread and diving back into the history, I have LONG thought that Connors would have won a calendar slam in 74 if it weren't for him being banned from the French for playing WTT. Of course, Borg won his first French that year. So Connors would have had to deal with that. But I mean. We never got to see Connors at the French in his prime. He couldn't/didn't play it for 5 years. Until 1979. And while he'd lost in the 3rd round and 1st round in 1972 and 1973, when he returned in 1979 he didn't lose before the quarters the next 8 times he played it (8 out of 9 years, missed 1986.) Maybe there are other factors at play that I don't know about.
But I think if it weren't for the feuds between the ITF and the WTT and WCT and all that, Laver wouldn't be the only one with a calendar slam. And while we all respect Connors for sure. I think we'd respect him even more. Of course, he could have just made the final and lost or made the semis and lost. He made the final of all 3 slams he played again in 1975 and lost all 3 of them to 3 different players. Newcombe in Australia. Ashe at Wimbledon. And Orantes at the US Open.
And then, I'll echo what several others have said that isn't for men's tennis. Obviously Monica Seles' stabbing is one of the biggest what ifs in sports of all time. We don't know if she would have continued to completely dominate or not. But I think we can mostly assume she would have. Steffi would probably be closer to 18 like Navratilova and Evert. And Seles would probably be up there with them. And Martina Hingis may never have even been a thing. Venus and Serena may have had to wait a little longer to take over. Seles probably never would have dominated Wimbledon. But she probably would have won at least one. I mean. She had been to the final of all 8 slams she played since the start of 1991 (missed Wimbledon in 1991.) She was nearly unstoppable. Seles would very possibly have a gold medal (1996 Atlanta). Of course, Seles was there. And was the number 1 seed. She had comeback and won the Australian Open that year. She lost to Novotna 6-8 in the third. Never a guarantee that anyone wins anything. But if she hadn't been interrupted and didn't have the trauma of it all she likely would have been a different player at those Olympics just like she would have been a different player everywhere else. Truly one of the greatest tragedies in sports history.