"It's always disappointing regardless against who you lose," said Federer, a three-time former runner-up to Rafael Nadal at the Monte-Carlo Country Club."I don't think I played terrible. Obviously, it was still the first week of clay, so I don't expect myself to play my very best. I think it's been a solid tournament. "I think I should have definitely gotten one of the sets. Every time I had this slight opening, things didn't go my way. I thought he did well. He played aggressive, played the right way he was supposed to."