City have been top of the table since 9 November and wrap up the championship – their first since 2016 – with a game to spare and a six-point lead over second-placed Chelsea, while Arsenal are four points further back.
Jeglertz, 54, becomes only the second manager in WSL history to win the title in his debut season after Chelsea’s Sonia Bompastor in 2025.
Midfielder Laura Coombs, who retires from football at the end of the season, and striker Vivianne Miedema are the only players to have previously won the WSL with former clubs Chelsea and Arsenal respectively.
Jeglertz, who joined City after leading Denmark at Euro 2025, added: “Only two players in the squad won the league before. That means something because it’s about believing you can win more games.
“We had a long streak of winning during autumn and that caused a feeling of needing to start talking about winning the league.
“I’m a strong believer that if you believe you can win, you have more opportunity to actually do it.”
City could add to their success as they face Chelsea at Stamford Bridge on Sunday for a place in the Women’s FA Cup final.
Players and staff gathered to watch Arsenal’s draw at Brighton, but Jeglertz was not worried about title celebrations affecting preparations for the tie.
“They are very professional,” he added. “They definitely deserve to enjoy this evening, whatever that means.
“From tomorrow and on Friday, we will put all our energy into the Chelsea game and for the semi-final.”