Esteban Carril Caso (born 24 May 1977) is a Spanish tennis coach and former professional player.

A native of Gijón, Carril was a three-time All-American varsity player at Texas Christian University.

Most of his tour matches were on the ITF Futures circuit, where he won one singles and nine doubles titles.

[1] Carril's coaching career has been highlighted by his three years with Johanna Konta, who he took from around 100 in the world to an Australian Open semi-final and top 10 ranking, before departing in 2016.

He had a trial period as coach of Emma Raducanu in late 2021 and was then announced to have joined fellow Brit Andy Murray's coaching team for the Stockholm Open.