Neymar, Messi Eye Duel as Copa America Kicks Off

A mouthwatering duel between Barcelona superstars Lionel Messi and Neymar is looming over the Copa America as the three-week football extravaganza starts in Chile on Thursday. (Battle for the South American Crown: Who Will Win the 2015 Copa America?)

One of the most eagerly anticipated tournaments in years starts in Santiago, with the hosts facing Ecuador in Group A at 8.30pm (2330 GMT) to launch their quest for a first ever Copa crown.

A galaxy of Europe-based stars will be on show in Chile, including Argentina captain Messi and Brazil counterpart Neymar, Colombia's James Rodriguez, Chile's Alexis Sanchez and Uruguayan striker Edinson Cavani. (Alexis Sanchez Ready to Fire Chile to Copa America Glory)

Messi and Neymar arrive at the tournament less than a week after inspiring Spanish giants Barcelona to the Champions League triumph, the final act of a glittering treble-winning season.

Both number 10s are carrying a heavy weight of expectation on their shoulders, with Messi determined to finally taste glory at a major international tournament and Neymar aiming to erase the memory of Brazil's World Cup debacle.

"I feel I'm in better shape arriving at this tournament than I was at the World Cup last year," Messi told reporters at Argentina's training camp.

Messi and Argentina fell agonizingly short at the World Cup, suffering a 1-0 extra-time defeat to Germany in the final to extend a title drought which stretches back to the 1993 Copa America.

- Messi determined -

Messi admitted that Argentina's richly talented squad -- which includes the likes of Carlos Tevez, Sergio Aguero and Angel di Maria -- were determined to end the Albiceleste's long wait for a trophy. (Messi Aims to Fill Trophy Void at Copa America)

"This generation is desperate to win a title with the national team," Messi said.

Manchester City star Aguero was even more candid. "If this generation of players don't win anything we're going to regret it for the rest of our lives," the striker said. (Messi Warns Rivals Ahead of Copa)

Argentina open their campaign against Paraguay on Saturday, and should progress from a Group B which also includes Uruguay and Jamaica, one of two teams from the CONCACAF region invited to bolster the tournament.

Argentina's title drought pales into comparison with the fate of long-suffering Chile, still waiting for their first Copa America title after 99 years.

Coach Jorge Sampaoli can call on a spine of world class players -- Barcelona goalkeeper Claudio Bravo, Italy-based midfielders Arturo Vidal and Gary Medel, and Arsenal star Sanchez -- as the hosts try to break their duck.

"This is the time to accomplish great things," Sanchez said.

- Brazil resurgent -

Brazil and Neymar meanwhile begin their campaign against Peru in Group C on Sunday.

Brazil's biggest challenge of the first round comes three days later when they face Colombia on June 17, a rematch of the two sides' bruising World Cup quarter-final last year.

That stormy encounter was notable for a series of rugged Brazilian challenges on Colombia star James, although Brazil's 2-1 win came at a price, with Neymar suffering a broken vertebra that ended his World Cup.

Brazil's World Cup dream was ultimately demolished by Germany in the next round, when the hosts were humiliated 7-1 in the semi-finals, before losing 3-0 to the Netherlands in an abject third place play-off display.

Fast forward a year however and Brazil under the guidance of 1994 World Cup-winning captain Dunga are back on track, reeling off nine straight wins since the finals.

One of Dunga's first acts last year was to hand the captain's armband to the Barcelona forward, and the 23-year-old has thrived on the added responsibility.

"It is not a surprise, but the statistics are there to show that when Neymar puts on the captain's armband, he takes a step forward," Dunga said. (Uruguay Confident Despite Luis Suarez Absence)