体坛英语新闻：Del Potro celebrates after Argentina reaches Davis Cup final

BUENOS AIRES, Sept. 18 (Xinhua) -- Argentina's Juan Martin Del Potro on Sunday celebrated his country's qualification to the Davis Cup final for the fourth time in history.

"I am happy, though it is a shame to finish this way because it was probable that I could have won. We didn't deserve to win due to this. I am Djokovic's friend and I feel bad because he made this great effort and finish like that. He is a great player," said Del Potro about world number one Novak Djokovic, who retired his game due to injury.

Del Potro was leading by 7-6, 3-0 on Sunday when Djokovic retired the game played in Belgrade Arena, sending Argentina to the Davis Cup final against Spain on Dec. 2 to 4.

The Argentine player told a sports television channel that "we always believed we could win" the series against the defending champion. Argentina has never won the Davis Cup.

Argentina has played three finals before: in 1981 against the United States in Cincinnati (1-3), in 2006 against Russia in Moscow (2-3) and in 2008 against Spain in Mar del Plata (1-3).