Real Madrid forward Cristiano Ronaldo's hair gel caused a giant uproar, sparking a war of words between WAGs on Twitter.

Israeli model, Bar Refaeli, criticized Ronaldo's hairstyle during Portugal's 1-0 quarterfinal match against the Czech Republic on Thursday. Refaeli tweeted: "The only thing I can think of when I watch Ronaldo is that hair gel should really be outlawed!"

Ronaldo's girlfriend, Irina Shayk, didn't appreciate Refaeli's criticism and tweeted: "Being a hater is not a cute look. Learn to love."

Refaeli, an ex of Hollywood A-lister Leonardo DiCaprio, played down her wisecrack and tried to make amends with her Sports Illustrated Swimsuit Issue colleague on Twitter.

She responded: "I love u and I love ur BF. I just don't like hair gel."

Ronaldo's Portugal side will meet the winner of Saturday's Spain - France quarterfinal Wednesday in Donetsk, Ukraine.