Murkel Alejandro Dellien Velasco (born 16 September 1997) is a Bolivian tennis player. He has a career-high ATP singles ranking of No. 168, achieved on 15 July 2024. He is the current No. 2 Bolivian tennis player. He also has a career-high ATP doubles ranking of No. 174 achieved on 1 April 2024. Dellien represents Bolivia at the Davis Cup, where he has a W/L record of 2âÂÂ4.
Dellien played college tennis at Wichita State.
In 2021 Dellien defeated Zizou Bergs in his first Davis Cup rubber.
In July 2024, he won his maiden Challenger title at the 2024 Ion ÃÂiriac Challenger in BraÃÂov, Romania with a win over Dmitry Popko in the final. With his brother Hugo winning the title at the 2024 IaÃÂi Open, also in Romania, the Delliens became the first brothers to win a Challenger title in the same season since the Cerúndolos in 2022.
He is the younger brother of fellow tennis player Hugo Dellien. Their father, Hugo Eduardo Dellien, represented Beni Department as a substitute member of the Chamber of Deputies for the Social Democratic Power alliance from 2006 to 2010.