Juventus great Alessandro del Piero has criticised his old club for not making the most of Cristiano Ronaldo during his three seasons in Turin.
Del Piero has weighed into the debate after seeing Ronaldo's two-goal return for Manchester United on Saturday.
He wrote for La Gazzetta dello Sport: "It is essential to avoid making comparisons with previous seasons or making excuses with the market or with those who are no longer here. Count those who are here.
"I don't think we should talk about the fact that we are not prepared, we have to deal with reality. Obviously, he didn't want to stay and paying such a high salary wouldn't have been the best. I still think that Juventus' attack can be very competitive.
"Ronaldo is a champion and we had to sign him. But the problem was that the team couldn't grow around the superstar. We often judged Cristiano's performances almost independently of Juventus' and it's symptomatic that something didn't work.
"The results in European competitions were not up to the task, but if we think that Manchester City has not yet won a Champions League, we realise that investment is not always synonymous with victories."