DOHA, Qatar (AFP) — Lionel Messi and Argentina's World Cup dream remains alive but an indefatigable Croatia side inspired by the enduring brilliance of Luka Modric stands in their way in Tuesday's semifinal in Doha.

Argentina has recovered from the shock of losing their opening game in Qatar to Saudi Arabia and made the last four with an exhausting win on penalties against the Netherlands at the end of a fractious quarterfinal on Friday.

Having been 2-0 up and cruising after 83 minutes, with Messi setting up one goal in sublime fashion and netting a penalty, they conceded twice late on and had to survive extra time before triumphing 4-3 in a shootout.

Backed by an enormous contingent of traveling supporters who have brought the passion, noise, and color of Argentina's own stadiums to this World Cup, Messi, and his teammates are starting to believe this really could be their year.

"We have balls, passion, heart and we are doing this for 45 million people," said goalkeeper Emiliano Martinez, and Argentina's optimism now has only increased after seeing great rivals Brazil go out in the last round.

Now aged 35, this has been billed as Messi's last chance to win a World Cup eight years on from Argentina's defeat in the final to Germany in Rio de Janeiro.

He is determined to seize the chance and has already scored his first two goals in the knockout rounds of any World Cup, netting against Australia in the last 16 before his penalty against the Dutch.

World Cup glory would complete a wonderful career for the seven-time Ballon d'Or winner, who is possibly the greatest club player ever.

After years of being unfulfilled at the international level he inspired Argentina to victory at last year's Copa America, but he knows there are no more dogged or durable opponents than Croatia.

After all, any sense of relief at avoiding having to play Brazil in the last four will be tempered by the prospect of facing a Croatian side who knocked out the favorites on penalties and never know when they are beaten.

"They are a great team who matched up to Brazil and at times were much better," admitted Messi.

"They have good players across the whole midfield and they have been working with the same coach since the last World Cup, so they all know each other very well."

Argentina coach Lionel Scaloni switched to a five-man defense against the Netherlands as he brought Lisandro Martinez into his line-up.

But the midfield is always key against Croatia, with Modric still controlling games at 37 and Marcelo Brozovic and Mateo Kovacic completing a formidable trio.