Novak Djokovic wants to play Serbia’s Davis Cup semifinal at home against Canada in September, but it won’t be easy with a packed schedule. “I expect that it will be very hard, because the US Open final is on Monday this year, and the first match of Davis Cup is on Friday,” he said. “I hope to play the final in New York, and the day after there is a charity dinner my foundation [In New York]. So I will come to Belgrade on Thursday, the day before the first match. Unfortunately, I will not have time to rest, adapt to the conditions, a different time zone, and a different climate. But when I come to Belgrade Arena, and feel the energy of the fans and the tremendous support, I immediately forget the fatigue.” . . . The Spanish sport daily Marca is speculating that Rafael Nadal may skip Cincinnati after Montreal as his sore left knee and left elbow are not feeling 100%. . . . Martina Hingis’ camp is denying that the Swiss is planning on making a return in singles. Her doubles partner in senior events at the Grand Slams, Lindsay Davenport, said that she believes that Hingis would do so. Hingis will play doubles in Carlsbad this week with Daniela Hantuchova. . . American Jamie Hampton, who was seeded for the first time at tournament, at the Bank of the West Classic, said it takes getting used to. “I’ve never had anything like that,” said Hampton who had to wait to Thursday to play. “I guess that’s one of the perks if you look at it like that of being a top 4 seed. You get a much later start. It’s just something that I have to deal with and learn as I go.” . . . Ryan Harrison has split with his coach Tres Davis and is now working with the USTA’s Jay Berger. . . Australian Bernard Tomic has hired trainer Allistair McCaw to working with him in the lead-up tournaments to the US Open. . . Aga Radwanska, who lost to Dominica Cibulkova in the final of the Bank of the West Classic, said they balls were very light and flying all over the place.