Lionel Messi and Cristiano Ronaldo are two of the greatest footballers in history, but they've both struggled to make significant contributions against their respective clubs Juventus.

In 2018, Ronaldo scored a total of 54 goals for Juventus, while Messi made just 26 appearances across all competitions. Despite this, it's worth noting that Ronaldo is one of the most successful players ever to wear Juve's shirt, with 27 goals and 9 assists across his career.

On the other hand, Messi has only managed to score 34 goals and have 13 assists for Juventus throughout his career, which means he hasn't been able to match Ronaldo's prolific goal-scoring output. However, it's important to note that Messi himself has said that he wants to be as dominant as Ronaldo on the field, so we can expect him to continue making significant contributions to Juventus in the future.

In conclusion, while Lionel Messi and Cristiano Ronaldo have had different success stories over their careers, both have shown that they can be equally impactful players for their respective teams. It will be interesting to see how Messi continues to perform at the highest level in the coming seasons.