Could Ding win this endgame vs. Carlsen (at this point in the diagram), in the game played yesterday at Lindores Abbey? Without using engines, it seems logical to me to play 41.Re3 or 41.Rd3 (instead of 41.Kc5 as played by Ding), with the idea of leaving the f2 Pawn to its destiny, but clearing a way for the King to the g6 Pawn, and eventually winning Black's other Pawns, while the White Rook is defending the g3 Pawn.
[fen "8/1k6/6p1/3K1p1p/1P5P/5RP1/4rP2/8 w - h6 0 1"]