She told the club's media: "Chelsea is such an amazing club, one of the best in the world. Being able to play with players that are the best in the world is an amazing opportunity at such a young age and I want to learn, grow and develop a lot. I feel like Chelsea is such an amazing environment to do that in."
Paul Green, head of women’s football at Chelsea added: "We’re delighted to bring Alyssa to the club. She’s a dynamic winger with electric pace, who can play on either wing and is very good in one-on-one situations. Alyssa is one of the best and most exciting young players in the world, and we’re looking forward to seeing how she develops further during her time with Chelsea."