The La Albirroja coach, whose team has never beaten the European champion, has already made history by taking the South Americans to the last eight for the first time.

And Martino knows his team has the ability to go even further.

"If I had to consider a tournament of 20 matches against Spain, then I think Paraguay would have fewer possibilities than Spain," he said.

"But you see in this kind of tournament, it's not just who plays better, but who has the heart, who has the stamina, the wish, who has the fighting spirit and it can come down to one scoring opportunity."

"I think in football you can expect any kind of result when you have to play 90 minutes, so I have no idea who will be in the next round."

Paraguay has enjoyed a memorable competition so far after an opening draw with Italy was followed by a victory over Slovakia and draws against New Zealand and Japan - the latter ending in a penalty shoot-out win.

But Martino is confident it still has more to offer.

He continued: "We have not had many good goal-scoring chances. We have had a few good moments, up to half-time against Slovakia we played well, we had our moments against Italy and then in the qualifying round we've had much better matches."

"We have not played too defensive matches either. We have had the same amount of ball possession as our rivals."

"There is a history yes, but we have to fight against this history and we just hope that tomorrow we can play better to have better possibilities."

Asked if he had any special plans to try and stem the attacking threat of the Spain, he said: "We could spend the whole night talking about how to neutralise the Spanish players, because you will ask me how to neutralise (David) Villa, then (Andres) Iniesta, then (Fernando) Torres and what have you."

"So we have prepared our match plan and we hopes it works out on the pitch tomorrow."

Martino felt the key to stopping the Spaniards was not allowing them to get hold of too much of the ball.

He added: Spain has so much of ball possession that it forces you to defend."

"Teams have prepared a certain way of playing, but Spain still scored."

"They have ball possession 65-70 percent of the game and they impose their style of play on you."

"We have to keep Spain from passing the ball. We have to move, show mobility up front, so that we can score goals."