Messi, 34, is technically a free agent as of July 1, with his contract running down before Barca could finalise terms on a new deal.
Sterling opened the scoring before skipper Harry Kane netted the second as England beat Germany 2-0 in the round-of-16 of Euro 2020.
The last meeting between these two teams in a major competition was at the 2010 World Cup, in which Germany defeated England 4-1.
Raheem Sterling's early header helps the Three Lions register a narrow victory over the Czech Republic to secure the top spot in Group D.
England beat Czech Republic 1-0 at Wembley on Tuesday to go through to the last 16 of Euro 2020 as Group D winners courtesy of Raheem Sterling's 12th minute goal.
Tottenham Hotspur forward Kane has been substituted in all two of England's Euro 2020 group stage matches due to disappointing performances.
With Harry Maguire not fully fit and Trent Alexander-Arnold ruled out of Euro 2020 due to injury, England's backline requires slight tweaks.
The defender has not played since injuring his ankle against Aston Villa at the end of last season and missed out on the opening day win over Croatia.
Jordan Henderson is set to play against Romania on Monday more than three months of injury lay off, whereas Harry Maguire is still working hard on his rehabilitation to get fully f...
Gareth Southgate has made the curious decision to include four right-backs in his squad for Euro 2020.