John McEnroe has challenged Nick Kyrgios to quit professional tennis if his heart isnt in it.Commentating on American television, McEnroe was scathing of Kyrgioss demeanour before the Australian retired from his third-round US Open match against Illya Marchenko with a hip injury.Kyrgios was trailing two sets to one: 4-6 6-4 6-1 - when he called it quits.The 14th seed complained of the injury during his first two matches and said he felt like hed been hit by a bus at one point during Saturdays defeat.McEnroe has been critical and complimentary of Kyrgios in equal measures since the 21-year-olds emergence as one of tenniss hottest prospects.Last year he lashed Kyrgios for his bonehead tactics during a first-round loss to Andy Murray at Flushing Meadows, while he also had cracks at the world No.16 at Wimbledon.But his criticism of Kyrgios on Saturday night could be considered harsh, given the youngsters obvious injury concerns.Nick Kyrgios, you dont want to be a professional tennis player, do something else, McEnroe said.There was no sign of any trouble early as Kyrgios broke Marchenko on the Ukraines first service game.He then held from 15-40 to consolidate for a 3-0 lead, the only break he needed to secure the opening set.At times he toyed with the world No.63, producing a series of nonchalant backhand-down-the-line winners to appear in cruise control.Kyrgios lit up Arthur Ashe Stadium when he ran down a drop shot and conjured an incredible around-the-net-post backhand winner in the fifth game of the third set.Out of nowhere, though, Kyrgios dropped serve at 4-4 after a double-fault and forehand miss to hand Marchenko the chance to put the match back on level terms.He made no mistake as Kyrgioss movement began to diminish.After all but conceding the third set in 34 minutes, two courtside treatments from the trainer didnt help as Kyrgios repeatedly moaned.I cant move. I cant turn, mate. Whats the f***ing point?Marchenko admitted it was not the way he wanted to reach the last 16 of a slam for the first time, five days shy of his 29th birthday.I feel sorry for Nick, he said.But its a dream come true. A win is a win and a win here on Ashe is a very special feeling for me.I cannot explain how happy I am.The Ukraine will play two-time grand slam champion and third seed Stan Wawrinka on Monday for a place in the quarter-finals.The loss was Kyrgioss first in 21 matches against unseeded opponents at grand slam events and will come as a bitter disappointment for the 21-year-old who had high hopes at the Open.Despite the setback, Kyrgios is set to climb to a career-high No.15 in the world after the tournament. Drew Bledsoe Womens Jersey . -- Golden State Warriors coach Mark Jackson asked his players a simple question during Fridays morning shootaround: How many of them had ever been on a team 14 games over . Steve Grogan Jersey . PETERSBURG, Fla. http://www.patriotsjerseysauthentic.com/Irving-Fryar-Super-Bowl-Jersey/ .Y. -- Sabres defenceman Tyler Myers had no intention of changing his hard-hitting style before taking part in a disciplinary hearing for his illegal check to New Jersey forward Dainius Zubrus head. Kevin Faulk Patriots Jersey . Brazilian national coach Luiz Felipe Scolari has confirmed that the veteran goalkeeper is set to join Toronto on loan, saying it will help him be ready for the World Cup. Tedy Bruschi Youth Jersey . "It was nerve-wracking, but we pulled through," said Collaros, who threw four touchdown passes to lead the Toronto Argonauts (8-4) to a 33-27 win over the Calgary Stampeders (9-3) in front of 28,781 fans at McMahon Stadium. Tony Bellew has slammed David Haye for threatening to put him in hospital when they meet next year.The two Britons clashed at a heated press conference on Wednesday and amid the arguments Haye told Bellew: Lets see whos around your hospital bed on March 4. His life is on the line.The pair then scuffled as they posed for photographs, with Haye hitting Bellew who shoved him back.Bellew, 34, was more critical of Hayes comments, with Germany-based super-middleweight Eduard Gutknecht still in a coma at a London hospital following a fight against George Groves on Nov. 18.British middleweight Nick Blackwell, meanwhile, needed surgery to reduce swelling on his brain after being injured in a sparring session last week.Blackwell had retired from boxing after being placed in an induced coma following a brain injury sustained in a fight against Chris Eubank Jr. in March.Im disgusted in David throwing a punch like that and some of the things he said, Bellew told reporters.He got too close and I just pushed him off and he caught me with a left hook to the head. He was a bit jumpy and nervous.Some of the things he said, saying you are going to a hospital bed while a boxer is in a coma just up the road, you just dont brag about things like that.We dont nneed clowns like him saying Im going to leave you in hospital.ddddddddddddI thought it was distasteful saying that because there are boxers in comas at the moment. Theres a line and he crossed it.Ive got previous so Im not perfect. But hes just not a nice person. Hes forgot where hes come from.Bellew will step up to heavyweight after one defence of his WBC world cruiserweight title and is not ruling out a permanent switch to the division if he beats Haye, a former world heavyweight and cruiserweight champion.If I knock out David Haye theres a new sheriff in town, Bellew told reporters.I would love to be a two-weight world champion.Im 16 stone right now. I will eat as clean as possible and I will try and stay off the KFC. Ive got no goal in mind when it comes to what weight I will come in at, but David will come in light because if hes slower than me then hes in a world of trouble. Im harder to hit than I look.Super-middleweight Groves, who trains at the same south London gym as Haye, has launched a fundraising appeal on behalf of Germany-based Gutknecht, who is being treated at St Marys Hospital in west London. ' ' '