Sky Bet suspend betting on Radamel Falcao's next club after seeing him backed at as short as 1/3 to join Real Madrid.
Morgan Schneiderlin has appealed to Southampton fans after a thwarted attempt to leave St Mary's.
The Turkey international moved to Spain from Galatasaray in 2011, helping Atletico win the Europa League in his first season and the Copa del Rey last term.
The 26-year-old told the club's website: "I feel very happy to have extended my contract with Atletico.
"After two years with Atletico I I feel like part of the family which is the club. If I'm so happy at the club, its because my team-mates are so strong and we're all in this together."