NEW YORK -- Heather Watson?said she will undergo blood tests after suffering from breathing difficulties, back pain and a fever in her first-round loss at the US Open.The British No. 2, who is now 0-6 in singles matches at Flushing Meadows, twice called for the trainer during her 6-2, 7-5 defeat to Richel Hogenkamp?having felt unwell?on another day of soaring temperatures at Flushing Meadows.?Watson had a medical timeout after losing the first set and cried in her courtside chair before taking medication and receiving treatment on her back.?She later told reporters her symptoms felt similar to when she was diagnosed with glandular fever in 2013.It was horrible to play. I was just very ill, she said. Ive had a fever for the last three days but playing in this heat is almost impossible when you feel that bad. I was struggling to breathe and my back was just getting [sore].I dont really know exactly what it is but Ive gone to see the doctor and Im going to get some blood tests done and try and figure what it was.Watson even needed one of the tournament doctors to carry her bag as she walked off Court 13.The 24-year-old twice managed to battle back from a break down in the second set, and even had two set points to level the match, but Dutchwoman Hogenkamp managed to break Watson again for a chance to serve out the match.Watson called for the trainer for the second time but wasnt able to take the second set to a tie-break, with Hogenkamp wrapping up victory in one hour, 42 minutes.On Court 4, Daniel Evans?joined fellow Britons?Kyle Edmund and Johanna Konta?in the second round here with a 6-2, 4-6, 7-5, 6-1 win over Rajeev Ram.British No. 2 Evans, who made it to the third round here in 2013, next faces highly-rated German teenager?Alexander Zverev.The 26-year-old, now ranked 64th, entered the top 100 for the first time in May before making the third round at Wimbledon where he lost to?Roger Federer.It was a bit patchy, could have been a bit more comfortable but winning first round is always good and in the end I was playing pretty well, Evans said. It wasnt easy. It was a court where I struggle to concentrate quite a bit. It actually helped me in the end because I had to focus hard.Later on Tuesday,?Aljaz Bedene was unable to find a way past Nick Kyrgios, losing 6-4, 6-4, 6-4 on the Old Grandstand court.Naomi Broady came out on top in a battle of Britain on Court 13 after edging?Laura Robson?6-7(4), 6-3, 6-4.Having been blighted by injury for long spells over the last tow years, Robson has enjoyed an encouraging run this summer with victory in an ITF tournament in Pennsylvania before she came through three rounds of qualifying in New York.Im feeling a lot of things right now but mostly disappointed, the 22-year-old said. I will get over it and probably think that overall this was a pretty good tournament but right now it sucks. Air Max2 Light Canada . The (11-11-4) Jets are seventh in the Central Division with 26 points. 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It was just enough to help lift Golden State to a 102-101 victory over the New Orleans Pelicans on Tuesday night.Rory McIlroy believes his game is heading in the right direction after making an encouraging start to his Northern Trust Open debut. The four-time major champion kicked off his first of five tournaments in a six-week stretch with a four-under 67 at Riviera Country Club, keeping him within one stroke of the clubhouse leaders Chez Reavie, Bubba Watson and Luke List.McIlroys gym-heavy training regime was brought in to question ahead of the West Coast Swing finale, with concerns raised about the risk of injury, but the world No 3 was encouraged by his start to the week as he chases a first win of the year. Its a great golf course and Im glad I got off to a good start, McIlroy said. I put myself out of position a couple of times, but with the way the golf course was playing it didnt punish you much. McIlroy mixed five birdies with a bogey during his opening round I felt like my pace on the greens was good and I lag-putted well. All of the things that you need to do around this golf course, I did pretty well today.Beginning on the back nine, McIlroy followed a seven-foot birdie at the 10th by finding the green in two at the monster 589-yard par-five next and two-putting from distance. McIlroys only blemish of the day came when he found the rough with his approach in to the 15th and was unable to save par from 12 feet, but the Northern Irishman bounced back with a gain at the 17th.ddddddddddddAlthough a tap-in birdie at the first lifted McIlroy within two of early pacesetter Reavie, the world No 3 struggled to find his rhythm and was unable to convert a number of chances along the closing stretch.After carding a string of pars and missing a 10-footer at the sixth, McIlroy pitched to three feet at the par-four next to post a fifth and final birdie of the day. The world No 3 opened with back-to-back birdies at Riviera Country Club I really like it (Riviera), McIlroy added. Id heard a lot of good things about the golf course. Ive watched it on TV a lot of times and having now seen it and played it, it has lived up to every expectation.It wouldve been nice to play the golf course a little firmer than it was this morning, but hopefully it will as the week goes on and presents a challenge.I feel really comfortable with my game at the moment. I feel like my game is in good shape and I can get in to contention.Watch the Northern Trust Open throughout the week live on Sky Sports 4 - your home of golf. Or watch from £6.99 without a contract, on NOW TV. Also See: Rory plays down gym concerns Masters on McIlroys mind WATCH: Rivieras rich history Golf live on Sky Sports 4 ' ' '