Only one person can save Team Portugal from World Cup humiliation -- Irina Shayk ... so says male supermodel Tyson Beckford who says the power lies squarely ... in her crotch.
Beckford -- a huge Portugal fan -- was out watching futbol at Serafina restaurant in NYC yesterday when he tried to explain why Cristiano Ronaldo crapped the bed during Game 1 against Germany.
"It's either the World Cup jitters ... or he's just too sexy to be playing!"
So, how can Ronaldo's super hot GF save the team? Beckford explains -- check out the clip.