Chelsea star Mason Mount has emerged as the club's fittest player.
The 21-year-old is known for his creativity and ability to pop up with crucial goals.
But it is his work-rate and effort in midfield that have so impressed manager Frank Lampard.
According to The Athletic, Mount is rivaled only by midfielder N'Golo Kante as the fittest man at the club.
When the club ran fitness tests, only Kante could rival Mount.
A source told The Athletic: "One of the reasons Lampard likes Mount is because he trains every day as if it is his last.
"He has the ambition to be one of the best.
"When the club made all the signings during the window, he reacted positively and made it obvious he was going to fight for his place."
