Messi may have one more chance to win a World Cup before he retires at the age of 31. There will always be debate over a World Cup team, and Argentina's team is no exception. Key players who appeared to be in line for a position on Argentina's roster, such as Alejandro "Papu" Gomez (Atalanta) and Fernado Gago, were omitted. However, there are several reasons why they might not have been selected by manager Gerardo "Tata" Martino. First, both players had serious injury concerns prior to the tournament. Papu Gomez missed most of the 2014-15 season with a knee injury, while Gago has spent much of the past two years recovering from surgery on his right foot. The decision not to include these two players in the squad could be interpreted as either a mistake or a strategy on Tata Martino's part. It's possible that both players will be given opportunities later in the year when Argentina faces lower-division opponents in domestic competitions. In addition to these two players, there are another four forwards on international rosters who could possibly replace Aguero if he misses out on the tournament: Javier "Chicharito" Hernandez (Manchester United), Carlos Tevez (Bolton Wanderers), Lucas "Lucho" Acosta (Santos), and Maximiliano "Maxi" Rodriguez (River Plate). Although none of these players are likely to start every game, they would provide valuable depth should any of their teammates get injured.