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. 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. Nike NBA Jerseys 2020 . Go to turbozone.ca to see more of his epic work and you can follow him on twitter (@Turbo_Zone). Gaurav Shastri - A tribute to the amazing fan base who stand outside during games at "Jurassic Park" and an unbelievable shot of Paul Pierce fearing a Raptor. Jermaine Marrow Jersey .J. -- Omar Cummings helped the Houston Dynamo advance to the MLS Eastern Conference finals. https://www.cheapmlbjerseysjustwholesale...rseys-2020.html. Englands only win in the four most recent trips north had been tight, and Scotland was expected after losing 28-6 to Ireland six days ago to show some venom against its archrival. Jordan Roland Jersey . - The RBC Canadian Open will return to Glen Abbey Golf Club next year, marking the 27th time that the national open championship will be played at the Oakville, Ont. Cheap Nike MLB Jerseys . - The Oakland Athletics say they are stopping negotiations to extend their lease at the Coliseum.Dwayne Smith paid tribute to the late Tony Cozier, plus discussed West Indies cricket and his IPL play-off aspirations with Gujarat Lions during a chat with Sky Sports Mark Butcher. Legendary commentator Cozier passed away on Wednesday at the age of 75 and Smith hopes a powerful speech the Barbadian made can inspire West Indies to boost their game in all formats.Smith says all-rounders Carlos Brathwaite and Jason Holder and batsmen Kraigg Brathwaite and Shane Dowrich will be key moving forward as West Indies look to build on their recent World T20 triumph. Gujarat Lions Dwayne Smith told Mark Butcher that hes hopeful that his side can win their remaining games and seal a place in the IPL final Smiths attentions at the moment, though, are focussed on the IPL, where he is aiming to help Gujarat Lions reach the play-offs in their debut season.ddddddddddddujarat have won seven of their 11 games so far - but will they grab an eighth victory when they meet Royal Challengers Bangalore on Saturday? Find out from 11am on Sky Sports 5. Also See: Cozier passes away IPL table West Indies fixtures/results Get Sky Sports ' ' '