Spain's Carlos Alcaraz speaks during a press conference at the Shanghai Masters tennis tournament. (AFP pic)

SHANGHAI: Carlos Alcaraz said he was feeling "mentally fresh" on Thursday ahead of the Shanghai Masters, after the Spanish star won his first title since returning from a months-long injury.

The world number three said his body was still adjusting to playing demanding matches after coming back from a wrist injury that sidelined him from April until the US Open in August.

But he comes into Shanghai having won the Japan Open on Tuesday, beating Jiri Lehecka 7-6 (7/4), 6-4 in the final.

"I'm feeling very good. Physically I'm well, I'm feeling mentally fresh," the 23-year-old told reporters in the Chinese city.