Real Madrid coach Jose Mourinho has admitted that he "fears" Juventus, while also drawing comparisons with his 2004 Champions League-winning Porto outfit.
The Portuguese coach believes that Antonio Conte's men have a real chance of winning the Champions League this season, referring to them as an "unsinkable vessel".
Juve currently sit top of Serie A, losing just two of their 18 games this season.
"I'll be honest, I don't like Juventus because I fear them," Mourinho told Tuttosport.
"I say they can win the Champions League. They represent an extremely compact collective, like an almost unsinkable vessel.
"This Juve really reminds me of my Porto side in 2004. If someone had forgotten, let me remind them that Porto won the Champions League that year."
Juventus play Celtic in the last 16, while Los Blancos face Manchester United.