"Obviously winning the tournament is a good feeling. It gives you confidence, but it feels like it's anyone's tournament and anyone's game really," Ruud said.
"If you look it's been several different winners on the clay this year, and in the three Masters 1000 alone there's been three different winners.
"The top three guys, they haven't won any big tournaments on clay this year, so I'm pretty sure they're hungry to get a big title.
"To me even though Novak (Djokovic) hasn't had the best year as he typically has or the same level, I think he is still the favourite. He is the No.1 seed, and he has 24 Slams under his belt, so if there's anyone who knows when to find their peak and form, it's probably him.
"Then after that it's a lot of other guys, and I also want to mention Rafa (Nadal) obviously. He is not seeded and he has not maybe played the way he used to play on clay, but if he is physically fit, he is up there in the favourites.