Chelsea are keeping an eye on Atletico Madrid midfielder Saul Niguez, according to transfer specialist Fabrizio Romano.
Saul first came to Atletico Madrid in 2008 during his youth days, earning a call up to the B team two years later. He made his debut for the first team in March 2012.
Following a successful loan spell at Rayo Vallecano, the Spaniard became a regular at the Wanda Metropolitano. He has since made over 300 appearances for Los Rojiblancos in all competitions, scoring 43 goals and helping the club to a La Liga title, two Europa Leagues, and a Copa del Rey.