"It's flattering when two of the top teams in the world want you to play for them, " said the 2008Fifa Player of the Year, who has yet to finalise personal terms with Real.
After FIFA had seemingly abandoned GLT in 2008 after freezing experiments into the practice, and preferring instead to look at using additional referees, the issue was reborn at the 2010 World Cup.
For despite winning the 1995 FIFA World Youth Cup and the 2008 Olympic Games with Argentina, Messi has yet to go past the quarterfinals of the World Cup -- and many commentators believe he needs to win that trophy if he is to lay claim to being the greatest footballer the world has ever seen.
His form through 2008 resulted in him being named Fifa World Player of the Year in January - only a month after he won the Ballon d'Or as the European Player of the Year.