“Well done for him,” Nadal said. “He was better than me.”
The win over the French player late on Tuesday enabled the Indian GM to gain 3 points.
The Indian GM started with a win over Aryan Tari (Norway) in the blitz before drawing with So in round two.
Nadal extended his dominance on the surface with a 6-2, 6-1 win over 19-year-old Greek Stefanos Tsitsipas on Sunday to win his 11th Barcelona Open title.