Rafael Nadal said he felt in good shape after advancing to the semi-finals of the US Open with a battling 6-4, 7-5, 6-2 win over Argentine 20th seed Diego Schwartzman.

Second seed Nadal, a three-time champion in New York, will play Italy's Matteo Berrettini for a berth in the final after the 18-time Grand Slam winner overcame a gritty performance from the 5ft 7in (1.70m) Schwartzman.