Good homework. This would actually explain why Mofils will never win GS. People have "slow" and "fast" muscle fibres. He is used to play 2 sets and going down with time. Definately Monfils is fastest on short distance, but for 3-5 sets best are mix of muscle fibres, would say Đoković would be winner on some Half marathon or even Marathon.
And congrats to Djoker for 3rd title this year. Gael prepared him very well, Cicipas didn't have any chance.
p.S. I would also write, male marathoners (white) are best in 30+ years. While female are best older, almost 34-38. But females dont have so much play (2-3 sets)