CAMPINAS, Brazil -- Cristiano Ronaldo again wore a brace on his troublesome left knee Friday, triggering a new wave of questions over his health as his Portugal team held its final World Cup training session before departing for a crucial game against the United States. Christian Yelich Jersey . The reigning world player of the year took part in some light workouts with the first team, followed by stretching. He was smiling and appeared at ease at practice at the team base in Campinas, northwest of Sao Paulo, as he took part in a playful game of keep away from teammates. The team was set to leave later in the day for Manaus for its matchup with the U.S. on Sunday. Portugal was humiliated in a 4-0 defeat by Germany in their opener. Another loss and the fourth-ranked team in the world could be eliminated even before its final Group G game against Ghana. Ronaldo has been hampered by tendinitis and a muscle injury since before the tournament, creating plenty of speculation about how he would perform in Brazil. He was doubtful to play before the Germany game, but declared himself fit and went on to produce a subdued performance that only added to the usual drama and scrutiny surrounding the player. Team officials dismissed reports suggesting that Ronaldo could be risking his health by playing, saying they were tired of having to deny every rumour about a player many consider to be the worlds best. They noted, however, that he often plays with a brace and said hes healthy and would play against the U.S. Teammate Helder Postiga also expressed frustration over the media circus around Ronaldo. "I have already answered so many questions about Cristiano Ronaldo. Actually we speak about him every day. If I am sick of it, imagine how he is feeling," Postiga said. "If he is available enough to train with us thats probably because he is feeling well. Hes been training with us all these days and as usual he always gives his best. Hes just fine." Ronaldo has been one of the best players in the world for about a decade, and last year he even passed Lionel Messi by ending the Argentina forwards streak of winning the FIFA Ballon dOr. He has also excelled on the world stage, helping Portugal reach the 2004 European Championship final and the 2006 World Cup semifinals. The team also advanced out of the group stage at both Euro 2008 and the last World Cup, and then reached the semifinals at Euro 2012. Although he is Portugals all-time record scorer with 49 goals in 111 appearances, Ronaldo scored just twice in the last two World Cups. Yovani Gallardo Jersey . Tennis Australia chief executive Craig Tiley told local media in comments published Wednesday that John Tomic would not be allowed into Melbourne Park in any official capacity or as a spectator. Matt Garza Jersey . -- A 25-year-old freelance journalist from British Columbia was formally charged on Thursday with a felony, five days after she was arrested in the United States over allegations she threatened to kill her hockey player boyfriend.Lee Westwood fired a superb 66 on the opening day of the DP World Tour Championship before expressing his disappointment at being denied a debut in the World Cup of Golf. Westwood rediscovered the form that carried him to the title at the Jumeirah Golf Estates in 2009 as he made seven birdies and dropped just one shot to claim the outright lead on six under. Lee Westwood fired one of his best rounds of the year to lead the DP World Tour Championship His round was a well-timed response to being axed from Englands two-man team for next weeks World Cup of Golf in Australia, an event he had been looking forward to having been chosen by Danny Willett back in August. But Willett withdrew from the event last week due to his ongoing back issues and, with Justin Rose currently taking an extended break from golf, Chris Wood was installed as Englands highest-ranked player. Westwood was set to partner Danny Willett in next weeks World Cup of Golf Under the rules of the competition, the highest-ranked player in each team gets to choose his own partner, and Wood opted to bring in his good friend Andy Sullivan instead of sticking with Westwood.I had never played the World Cup before so I was really looking forward to it, and Ive heard Kingston Heath is such a great golf course, Westwood told Sky Sports. After Willetts withdrawal, Chris Wood was Englands highest-ranked player and chose to partner Andy Sullivan Danny asked me to play back in August. We were paired together in the Ryder Cup, so we thought wed have a go at the World Cup as well.Obviously Im a little but disappointed, but everybody has to do certain things for certain reasons, and I understand. It goes down the world rankings, so it was up to me to be higher up the rankings to be able to pick my own partner. Live European Tour Golf November 18, 2016, 8:00am Live on Get Sky Sports Get a Sky Sports pass If Im high in the world rankkings and the money list next year, he (Wood) probably shouldnt be expecting a pick if I play in the World Cup! But its Chris prerogative to pick whoever he wants. Stephen Vogt Jersey. He gets on well with Sully, and Sully is a good player, and theyll have a chance.I can understand him picking a mate and hes picked a very good player. I think its probably more to do with the rules than anything, but I think the week before somebody is meant to go down there is a little late to say, no, youre not playing. Westwood bounced back from his disappointment with a 66 in Dubai Westwood, who is ranked seven places below Sullivan at 47, did lift his spirits with one of his best rounds of the season in Dubai which emulated his opening 66 over the Earth Course that set him up for a dominant six-shot victory seven years ago. Six months half price Upgrade to Sky Sports to watch Man Utd v Arsenal on Saturday and get the first six months half price That win is certainly in the top two or three performances in my career, he added. Its maybe even the best performance of my career, knowing that I needed to win to beat Rory in The Race to Dubai, and did that by six and pretty much dominated the field over the weekend and its right up there.Today was all good really. I played lovely, hit a lot of fairways, a lot of good iron shots, putted nicely and I didnt make too many mistakes out there. This is as good as Ive played for quite some time. Westwood laps up the applause as he approaches the 18th green Ive found a couple of keys in different parts of my game and Ive been working on them hard. A 66 is a good round of golf, and it didnt seem that easy out there. Some days you feel like theres a lot of birdies out there but today I think was a pretty stiff test.Its a golf course Ive played well on in the past and Ive had quite a few good results here other than the win, and played pretty well in the desert. Ive been looking forward to this week.Upgrade to Sky Sports now to watch Man Utd v Arsenal this Saturday and get the first six months half price! Also See: Westwood snub unfair Rose to team up with Stenson Golf live on Sky Sports 4 European Tour Schedule ' ' '