Paul Singer is proving to be a battle-hardened creditor. The billionaire US hedge fund manager, who runs Elliott Management, has scuttled Argentina’s $2 billion bond sale through a fresh injunction from a US court. Argentina had defaulted on an earlier set of bonds in 2001 and offered investors a steep haircut. Singer and a handful of bondholders opposed the plan with the US court then ruling that Argentina shell out $1.6 billion to the holdouts. Argentina’s refusal has resulted in a decade-long wrangle that has now scuttled it from raising money from the global market to help pay down over $6 billion of debt maturing this year.  With general elections due in October, the stage is set for a long-drawn battle.