Juventus striker Cristiano Ronaldo admits he's been impressed by Barcelona's summer market work.

Ronaldo is aware of Barca's swoop for Antoine Griezmann (Atletio Madrid) and Frenkie de Jong (Ajax).

The former Real Madrid star told Marca: "Barça has made a big transfer window, like every year. I see them as very strong.

"They have strengthened well with De Jong, Griezmann, like last year with (Philippe) Coutinho, (Ousmane) Dembelé.

"It's still one of the best teams in the world. Like Madrid, with (Eden) Hazard, (Luka) Jovic, (Ferland) Mendy and Juve too."