Infobox last updated on: 2 March, 2009.

Nicolas Almagro Sanchez Rolle (Spanish: Nicolás Almagro Sánchez Rolle; born 21 August 1985 in Murcia, Spain) is a Spanish tennis player. He plays right-handed and uses a single-handed backhand. As of late 2008, Almagro is the third-youngest of the many Spanish players in the ATP Top 100 (after Rafael Nadal and Marcel Granollers).

Almagro had been a highly rated junior for many years, and finally realised his potential in 2005. He played in the main draw of 3 out of 4 slams, and recorded his first victory over a top 10 player when he defeated Marat Safin 6–4 6–3 in Rome. Since then he has cemented his position within the top 50, but his results have remained somewhat inconsistent. His ATP career record against Top 10 opponents is currently 6–12, with previous victories coming against No. 4 Marat Safin at 2005 AMS Rome, No. 9 Guillermo Coria at 2006 Barcelona, No. 6 Nikolay Davydenko at 2006 AMS Rome, No. 7 Tommy Robredo at 2007 AMS Hamburg and No. 8 David Nalbandian in 2008 in Alcapulco.