Of course it does. 72...Rg3 is a dreadful move.

I'm no expert on R and P endings and it took me a while to work out why it's such a bad move but once you see it it's clear. The clue is in Giri's previous move, <72.Ra4>.

Black's backward g-pawn is doomed but black can gobble up one of the white pawns in return. Giri realises his only chance of winning is with the connected e- and f-pawns so he's happy to give up the h-pawn and drops the R back to defend the all-important f-pawn.

A player of Nepo's caliber should have realised the same thing but with <72...Rg3?> he relinquishes his attack of the f-pawn. This frees white's R to do it's worst.

<72...Kf7> would have saved the game.

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In recent tournaments, aspects of Nepo's play are the chess equivalent of Nick Kyrgios.

Here Black played 58..Re1. Its not a losing move but its still a shocking move. With the Black Rook on g1 there is nothing doing in the position. Nepo can move his King to any square and there's simply nothing doing at all.

In the game he lets the White King march up to h6. After that there is some work to do and care is needed. But Nepo didn't calculate anything and didn't take care.

First Giri avoids the most open lines of Grunfeld opting for safety reaching completely even position out of opening. After 26th white move:

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Of course, it was Nepo that deviates and wants to play more with a dubious temporary pawn sacrifice (?)

26. ...Bd3?! (truly strange and totally unprovoked move.) which after inaccurate move

29. ...Bf6? [Qxa2 of course]
30. Be5 Qxa2
31. Ra1

becomes true pawn sacrifice without compensation!

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Gir continued in totally expected way and of course, couldn't find the way to win.

After 30 move fiddle without any progress Nepo makes another one of his howlers:

72. ...Rg3??

which allows white to get connected passers and elementarily won endgame.

Giri won a game with no "guilt" of his own.

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[both h-pawn and f-pawn are doomed]

There were plenty of opportunity that Black could have made a draw cemented, for example here:

After 64th move of white:

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64. ...Rg2
and then Rg1-Rg2-Rg1 etc. White can do nothing. If white decides to push pawns then exchange one and Re2 (Re1) - Re3 closing the white king again. Black king would just go g7-h6 not allowing white king any way to h6.

Many has been commented on. Most mysterious to me is that Black also missed the simple 65.-,Kg7

Instead he played 65.-,Kf7(??)
Having White's king walking to h6 is obviously dangerous, even though I read it would still have been a draw.

65.-,Kg7 is an easy draw:

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66.Kg5,Rg2+ and White got no further.

White can play 66.Re6 (which 65.-,Kf7 prevented) (or 66.Ra3, makes no difference)

After -,Rf1 67.Kg3,h4+ White must choose:

68.Kxh4,Rxf3
White to move:

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Nothing to do.

or

68.Kg2,Ra1

White to move:

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Black will check, and to even try to win, White must abandon his h-pawn which clearly will not work.

Easy to calculate (if I didn't miss something). Much easier than having the white king walking into Black's position.

But chess is filled with our mysterious decisions.

Ian Nepomniachtchi - the most winning and losing player of Sinquefield Cup 2019.