Much as I love JM I am realistic enough to say he doesn't have much chance at this stage in his career. As jayjay says - he has never played a 5-setter before, and he had never won a match in a Slam until this week! Good as he is - he's still only just 18, and lacking in the experience of pressure situations, and also in stamina and physical strength to play someone like Gonzalez. Their match in Basel was very close and JM was a break up in the final set - but I think it will be at least another year or so before he'll win big matches like this. Always modest and honest, ths is what JM says of his chances in a newspaper article:
"Jugué un par de veces con él y lo tuve cerca, pero si no hago las cosas perfectamente no voy a poder ganarle. El está por encima mío en físico y en tenis también, pero si estoy diez puntos le puedo dar batalla. La verdad es que todavía no estoy para jugar cinco sets en este nivel",
“I've played against him twice and I wasn't far away from winning, but if I make mistakes I'm not going to be able to win. He is better than me both at playing tennis, and he is more physically fit than me. I can fight him, but to be honest, I don't think I'm ready to play five sets at this level".