Federer lost the 2005 Tennis Masters Cup final to David Nalbandian in a dramatic five-set match (6-7, 6-7, 6-2, 6-1, 7-6) in Shanghai. This was one of Federer's rare losses at year-end championships. Nalbandian, known for his attacking style and ability to challenge Federer on fast indoor courts, handed Federer a shocking defeat despite Federer being the heavy favorite.