Chelsea have reportedly reached an agreement to sign Atlanta United star, Caleb Wiley, this summer. The Premier League west London club have already made five signings this summer under their new manager Enzo Maresca. They have signed the likes of Tosin Adarabioyo, Kiernan Dewsbury-Hall, Marc Guiu, Estevao Willian and Omari Kellyman. However, according to The Athletic, the Blues are now closing in on signing Wiley. The 19-year-old United States international is expected to join for a fee of £8.5million. But the left-back is likely to head straight out on loan to French club, Strasbourg next se…