Shinji Okazaki has warned Paraguay that Japan have "nothing to lose" as they bid for a historic place in the World Cup quarter-finals on Tuesday.

Okazaki opened his World Cup account when he climbed off the bench to score the clincher in the 3-1 Group E win over Denmark on Thursday to seal Japan's place in the last 16 for the first time on foreign soil.

He said: "We didn't have a South American team in our group and I expect there will be fiercer tackling for the ball and the most important thing is that we don't lose those battles. We have got nothing to lose."