HAMMER BLOW Pochettino's side crashed to a shock 1-0 defeat at West Ham on Friday that left their title bid in tatters and put Chelsea within touching distance of being crowned champions Mauricio Pochettino fears Tottenham have blown their chances of winning the Premier League because they lack the ruthless streak required to succeed under intense pressure. "We have to wait but are thinking that it will be hard to catch Chelsea", said Pochettino.