Peterborough United's League One rivals have sacked their manager. The summer transfer window officially opens on June 15 and runs until 11pm on Monday, September 1. But players without a club can be signed at any time and clubs can sign players on loan dependent on their league's regulations. All the signings made by League One clubs will be tracked on the PT Summer Transfer Blog. Peterborough United's manager will be watching these developments closely. The club's fans are eager to see how the summer transfer window will shape the team's chances in the upcoming season. And with the rival manager's sacking, the League One landscape has changed. Peterborough United's squad is expected to undergo some changes during the transfer window. The club's owners have stated their intention to strengthen the team. So, the next few weeks will be crucial for Peterborough United. The summer transfer window is a critical period for the club, and the fans are waiting to see what signings will be made. Peterborough United's League One rivals are also expected to be active in the transfer market.