“I just need to keep working and keep going,” the 21-year-old Khachanov said afterwards. “I felt I was playing good here from the first day. It’s nice to play on a full court in the final, and I hope to come back next year.”

Stan Wawrinka’s still battling his left knee.

First-round matches to look for are (4) Querrey vs. Sela who he is 2-2 against career, (7) Del Potro vs. Anderson in a meeting of former Delray champions, (4) Johnson vs. crafty fellow American (WC) Kozlov, and (1) Karlovic vs. Young in a rematch of the 2015 Delray final (winner to possibly meet Fritz)…

Rafa says he is healthy and has commented on the brutal heat and humidity in Rio, which is scheduled to continue through the week.

Rafael Nadal steamrolled on in Rio while fellow World No. 1 Serena Williams said goodbye to Dubai.

Seeds: Caroline Wozniacki, Svetlana Kuznetsova, Venus Williams, Victoria Azarenka, Elena Dementieva, Jelena Jankovic, Aggie Radwanska, Na Li, Sam Stosur, Flavia Pennetta, Marion Bartoli, Vera Zvonareva, Yanina Wickmayer, Francesca Schiavone, Nadia Petrova, Jie Zheng

“John McEnroe turns 50 tomorrow — it’s incredible how well this guy still plays,” Sampras said following the match. “I’m in awe of it actually. At 50, it’s amazing to move that well. It’s pretty incredible.” McEnroe beat Sampras last year en route to the Boston title. Todd Martin won the third-place match when Jim Courier pulled out with a bad back.