Overview

• Chelsea remains winless in their US pre-season tour, drawing with Wrexham and losing to Celtic.
• Celtic capitalized on defensive errors, scoring four goals with ease.
• Enzo Maresca emphasizes the team's need to improve both on and off the ball.
• Maresca remains optimistic about Chelsea's readiness for the Premier League opener against Manchester City.
• Chelsea's next pre-season match is against Club America in Atlanta.