BUENOS AIRES, Sept. 18 -- 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).

【体坛英语资讯：Del Potro celebrates after Argentina reaches Davis Cup final】相关文章：

★ 体坛英语资讯：Tanzania dances for joy at torchs sub-Sahara debut

★ 体坛资讯：Vietnam jails referees, officials in bribery scam

★ 娱乐英语资讯：41-year old Halle Berry pregnant with first child

★ 体坛英语资讯：Pairs skaters challenged by system

★ 娱乐英语资讯：Brad Pitt manager denies Jolie birth report

★ 体坛英语资讯：Celtics wrap up best record

★ 体坛英语资讯：Seeded players raise US Open heat

★ 体坛英语资讯：Capello warns Beckham not to expect any favours

★ 体坛英语资讯：Ekstroem beats Schumacher in Wembley final

★ 体坛英语资讯：Liu settles for nothing but world title