Navratilova has a case for GOAT of course but LMFAO at those arguing it is based on her "strong competition". At the 83 US Open Navratilova stormed out of a press conference since the press were harassing her about the terrible field. That tells you all you need to know. These were the 83 (Navratilova's best year) slam finals:
83 French Open- Evert vs Mima J.
83 Wimbledon- Navratilova vs an already past her prime/soon to retire Jaeger
83 US Open- Navratilova vs Evert (ok this on paper was strong but Evert was playing some of her all time worst tennis)
83 Australian- Navratilova vs Jordan
3 of the 4 were a total joke obviously, and then the first 3 were jokes as far as the finals themselves, with 10 games only won by the loser in 6 sets combined. The only decent final and performance by a losing finalist was up to Kathy Jordan of all people, very good player but just a typical top 10 player in any era at best, who got 8 games vs Navratilova in the 83 Australian Open final, almost matching the other 3 combined, including the worst ever version of Evert, got in the other 3 finals. There was even an article in Tennis Magazine at the end of 83 walking back agreeing with King on women deserving equal pay given how abysmal the womens game had become, bemoaning it as the worst in about a century, and saying the womens game had gotten so bad if it didn't improve it should be cancelled. I have a copy of that particular magazine at home if anyone wants it mailed to borrow just to read it for themselves. And the only player to beat Martina that year was Kathy Horvath, which also speaks very poorly to the field, when the only player who can beat you is someone that mediocre, not someone atleast semi noteable. Compare that to say Graf who in 87-89 only losses were to legit opponents like Navratilova, Sabatini, Sanchez Vicario, the 7 total.
Shriver was #3 or #4 almost the entire 82-86 period. That tells you all you need to know. A player like Shriver briefly reaching #3 or #4 is fine but constantly being there.

And Graf haters make fun of her era because of Sanchez Vicario or Sabatini being top players when both are light years better players in singles than Shriver is, as Sabatini already proved by baby Sabatini regularly beating peak Shriver, often crushing her.
Serena's competition at the end of her career was weak no doubt, but winning a ton of slams in your 30s is impressive no matter how crummy the field is, which I apply to Djokovic today as well. As Navratilova herself shows as she played at a super high level for her age in her 30s, amongst the highest ever after Djokovic and Serena, and still managed only 1 slam after her 31st birthday, and wouldn't be a lot more even if remove Graf and Seles (a few more most likely but wouldn't be raking them in clearly, and the field without Graf and Seles sucks, especialy according to Navratilova bots who claim Sanchez and Sabatini and Martinez are supposably terrible players). And even the weak field she played at the end of her career had a ton more depth than any field Navratilova faced, so was still better than what Navratilova faced in 82-86 which was both super weak as well in top end competition (minus only Evert the 2-3 years of that Evert was actualy playing fairly well, and the 1-2 Mandlikova was) and something below the levels of non existent in both short field and deep field depth. And of course the field Serena faced in 99-2008 was light years beyond anything Navratilova ever faced overall, even counting the periods she was barely winning, never mind focusing on the entire of 82-86 which was never strong, and only decent in 85-86. If you want to add 87, even though it was Graf, not Martina, who was #1 that year, that year was also weak, as proven by 17 year old Steffi Graf, who was nowhere near as good yet as 88 and 89 losing only 2 matches the entire year.
And saying Navratilova had Graf is silly when their primes didn't intersect, the only years they were both somewhat close to their primes in the same year was 87, where Navratilova per always had the experience advantage in slam finals, with Graf despite being atleast as far from her prime as Navratilova totally dominating the rest of the year where that older player age in initial slam finals was not present. Graf is not given credit for having Navratilova as competition ever that I see, so why on earth should the reverse be true. So many games are always played by Navratlova fans to advance her credit others don't get. And the total baby Graf that Navratilova played while dominating in 84-86 was of course light years inferior to any of Venus, Henin, Sharapova, Clijsters, Davenport, etc...An older Graf would have been a tougher opponent than any of those (although not than all those combined still) but we already know Navratilova would not have even been dominating in the first place had she faced an older Graf those years.
I will say Navratilova's most amazing feat is winning 13 times in a row against the great Chris Evert. That is amazing, even if some of that period of 13 (but not all, just some) was Evert playing some of her worst ever tennis, like around the time of the 83 US Open where she looked abysmal even in her matches to reach the final which she still reached in that godawful field at the time. Still amazing even considering, a legit GOAT contender and winning 13 in a row. She is perhaps the only player in history who could have managed that against a fellow GOAT, given that Graf is a horrible match up for Evert I could see her coming close to 13 maybe had they been in their primes together, but probably not reaching 13. I don't see Court beating any ATG, let alone a GOAT, 13 times in a row. I don't see Graf or Seles ever beating each other 13 times in a row, well I am sure
@Mustard and
@buscemi will be here to chirp in they are sure Seles would have had a 13 match win streak vs Graf had she not been stabbed, but they can continue that fantasy, the 99.999% of everyone else will concede that never happens for either one in a trillion years, LOL! So that is an amazing feat by Martina, and one of many things that gives her a possible case for GOAT. However Evert is often used to gloss over the overall terrible field of nearly the entire Navratilova reign, no Evert alone does not make a good field, and does not change that the overall field totally sucked. This is literally the only place I ever see "strong competition" brought up as an argument for Martina. I see many others (many legitimate) brought up to argue her as GOAT, and against her major weaknesses in the argument, such as only 18 slams, and winning only 3 slams outside a 5 year period, but NEVER competition, only here does that bizarre idea seem to exist.
On that note would add Serena going on a 16 year unbeaten streak vs Sharapova including I forget how many matches is also amazing. Sharapova is a legit ATG, not a GOAT contender, but a legit ATG who has a Career Slam. I would bet a million dollars transported to time none of Navratilova, Evert, Court, Graf, Seles, anyone you name would come anywhere near matching that kind of win streak vs a player of Maria's groundstroke quality, firepower, and mental toughness. So that is an amazing feat too, even if Maria is not near Evert as a player, almost equally amazing as the 13 match win streak vs Evert. A super impressive feat by both.