Brazil team doctor Rodrigo Lasmar joined manager Tite in the post-match press conference and said that the star player Neymar will have a scan following the ankle blow.
Cristiano Ronaldo missed a couple of big chances in the early stage of the match in the first half but finally put Portugal in front with a goal from the penalty spot.
The prestigious event will see 16 top teams vie for the coveted trophy and matches will be held simultaneously at the iconic Kalinga Hockey Stadium in Bhubaneswar and the newly-built state-of-the-art Birsa Munda International Hockey Stadium in Rourkela.
Uruguay had 56 per cent of the possession compared to South Korea, which had 44. Uruguay had only one shot on target while South Korea had none. The Asian side did ten fouls while Uruguay had 7.
Both teams Uruguay and South Korea had plenty of openings but failed to convert them into goals. The Spurs attacker and South Korean skipper Heung-min Son had surgery earlier this month after suffering a fracture around his left eye in a collision during a Champions League game.
Xherdan Shaqiri's assist helped Breel Embolo score a crucial goal in the 48th minute of the match to give the Swiss team a 1-0 lead, which they maintained until the end.