Jeff Carlisle breaks down the importance of Antonee Robinson playing a full 90 minutes in the Premier League. (0:54) The U.S. men's national team roster for the March international window was always going to be looked at with intense scrutiny. Manager Mauricio Pochettino will no doubt cast a critical gaze over the 27 players named to team for games against Belgium and Portugal. But beyond critiques, Pochettino is preaching something else: flexibility. While obviously much lower in importance than the World Cup later this year, the upcoming window qualifies as an important moment. It's the last time the USMNT will get together before the World Cup roster is named in May. There's fine-tuning to be done in terms of personnel and tactics. It was also viewed as a veritable Last Chance Saloon for some players as they jockey for playing time and roster spots.…