Barcelona Star Lionel Messi has finally responded to Cristiano Ronaldo's challenge offer in Italy. Ronaldo left Real Madrid in the summer and signed for Juventus, ending his nine-year stay at Los Blancos. The Portuguese came off to bench to earn Juventus a point in the 2-2 draw against Atalanta. But earlier this month, Ronaldo urged his rival Messi to come and join him in the Serie A. "I'd like him to come to Italy one day. I hope he accepts the challenge like me, but if he's happy there then I respect that," Ronaldo told the Italian press. He was also asked if he missed Messi, Ronaldo replied: "No, maybe it's him who misses me. I've played in England, Spain, Italy, Portugal and for my national team, while he's still in Spain. "Maybe he needs me more. For me, life is a challenge, I like it and I like to make people happy. He's a fantastic player anda good guy, but I don't miss anything here. This is my new life and I'm happy...