Carlos Ramos was born in Lisbon, 1971. He is a Portuguese tennis judge. He is one of the chair umpires to have obtained the Gold certificate, the highest possible certification, from the International Tennis Federation.

In his career he has participated in all the Grand Slam tournaments, managing to referee the final of the men's singles in all four Grand Slam tournaments.

The first final as chair umpire was the men's singles at the 2005 Australian Open, at the following Grand Slam Roland Garros 2005 he refereed the women's singles final. Only in 2007 did he return to referee an important final, at the 2007 Wimbledon Tournament in fact he refereed the final between Roger Federer and Rafael Nadal.

2008 sees him protagonist of three Grand Slam finals, he begins in Australia (for the second time) with the final between Novak DokoviC and Jo-Wilfried Tsonga, four months later he referees his second Roland Garros final, but the first singles men, still finding themselves in the field Roger Federer and Rafael Nadal. The third consecutive final arrives at Wimbledon, this time in the women's where she referees the match between the Williams Sisters, then won by Venus.

He returned to the field in 2011, in fact at the US Open he refereed the Dokovic-Nadal final and thus completed his Grand Slam.

He also participated as chair umpire in Davis Cup marches, including the final between Spain and Argentina in 2011, in the Fed Cup as well as in the Olympic Games

At the London 2012 Olympic Games he acted as chair umpire for the men's singles final between Roger Federer and Andy Murray, thus completing his Career golden slam.

He referees the match between Naomi Osaka and Serena Williams in the final at the 2018 US Open. Ramos, after having given two warnings to Williams (for coaching and for racquet abuse), assigns her a regulation penalty game at the third warning for "verbal abuse," as Serena accuses him of being a thief. In the throes of a nervous breakdown, she replies to the judge: "I've never stolen in my life, I'm a mother, I have a little girl and you rob me. It's the same story every time. Do you do it because I'm a woman? You have to apologize with me!"
The match turns into a real drama.