Real Madrid needed a 96th-minute winner from Jude Bellingham to defeat Valncia 2-1 at the Mestalla.
A Real Madrid comeback inspired by the veteran by Luka Modric and finished off by Jude Bellingham ruined Carlos Corberan'ss first match as Valencia manager, with Los Blancos running out 2-1 winners to move to the top of the La Liga table.
Valencia, who are facing the real prospect of a relegation dog fight, were faced with arguably the hardest debut fixture for coach Corberán.
However, the hosts started on the front foot, asserting themselves with fast, flowing attacks.
Hugo Duro and Andre Almeida were denied by Thibaut Courtois, before Duro eventually scored from a rebound.
Valencia's lead was threatened by the visitors who poured forward in search of an equaliser, but Jude Bellingham's penalty was denied by the post.
Kylian Mbappé's goal was chalked off for offside, and Rodrygo's header flashed over the bar.
Things got heated in the 70th minute as Vinicius Jr's was sent off for a petulant push on the Valencia goalkeeper.
However, Luka Modrić equalised with 5 minutes remaining and the momentum shifted.
Hugo Guillamon's underhit backpass was seized on by Bellingham, who curled home the winner in the 96th minute.
Real Madrid extended their unbeaten run to six matches, while Valencia remained in the drop zone, four points from safety.