The Danish international joined the London club on Tuesday, signing a three-year-deal having spent three and a half years at Wolfsburg.
“We are obviously aware of Pernille’s many qualities and the value that she has on the pitch for our team. On the other hand, I’m sure that other players who have not yet fully realized their potential will now come into focus, and that this will allow us to continue down the path that we have been on for the past few years.”
Harder, who is regarded as one of the world’s best players, scored 103 times in 113 matches for Wolfsburg, including 25 Champions League goals from 28 games.
During her time in the Frauen Bundesliga, she won the league and cup double four years in a row and finished top scorer in the league in two of those seasons.
Harder’s last game for Wolfsburg was a 3-1 defeat to Olympique Lyonnais in the Champions League final on Sunday. She had scored four goals in Wolfsburg’s 9-1 victory over Glasgow City in the quarterfinals.
“She is a fantastic team player who wants to take her game to the next level. She chose Chelsea as the club that can push her to that level. She can play for any team in the world, but she chose us.
“She chose the players, the staff, the environment, the playing style. You can’t get a bigger compliment than that from one of the best players in the world.”
The 27-year-old will help form an exciting, attacking Chelsea front-line, along with Australia’s Sam Kerr and England’s Fran Kirby and Bethany England.
Harder’s partner, Sweden defender Magdalena Eriksson, is Chelsea’s captain and lifted the Community Shield at Wembley on Saturday.
Chelsea, who were awarded the Women’s Super League title last season by just 0.1 points after it was canceled because of the coronavirus pandemic, begins its title defense at Manchester United on Sunday.