Chelsea manager Emma Hayes described Sam Kerr and Fran Kirby as "out of this world" after the star duo helped mark a significant anniversary in women's football with a 3-0 win over Arsenal in the FA Cup final.

The Women's FA Cup showpiece fell exactly 100 years to the day since the Football Association (FA) banned women from playing football – it took almost 50 years for the ban to be lifted when Southampton defeated Stewarton Thistle 4-1 in the first tournament in 1971.

Sunday was all about celebration as more than 40,000 fans packed into Wembley to watch Chelsea trump London rivals Arsenal in the 2020-21 decider, which had been postponed due to the coronavirus pandemic.

Englishwoman Kirby opened the scoring before Australian star Kerr scored twice, including a stunning chip, as Chelsea added to their Women's Super League and Women's Continental League Cup success earlier this year, completing a domestic treble for the first time in their history.

"I thought we got it spot-on. We predicted what they were going to do and they did what we thought they were going to do," Hayes said post-match. "We've painted Wembley blue, it's certainly a Chelsea day today and our performance was absolutely superb.

"The front two were out of this world. I said to Fran it was the best game I've ever seen her play for Chelsea and Sam's confidence is growing. But everybody played their part, did the job we asked them to do and we thoroughly deserved to be winners.

"To think we are treble winners, it is an amazing achievement – you can't ask for any more from the players and I am extremely proud of them, the staff and the club. 

"We have built this team over a long period of time and today I think we showed why we are champions. [There will be] zero chance of celebration. The bus is leaving from here and they are going home - they know the deal, we need to win [against Juventus on] Wednesday!"

Kerr became the first Australian woman to score in a Wembley final in a player-of-the-match performance.

She also became the third Australian – man or woman – to celebrate FA Cup glory at Wembley after Liverpool's Craig Johnston and Harry Kewell.

"So many wondered how Sam would cope in the English game. As far as I am concerned she is the best striker in the world," said Hayes. "She is courageous, she is full of confidence. She’s a superb athlete and an amazing human. 

"And she can do that after getting off a plane from Australia on Thursday… She did not have a good night's sleep last night but she just brushes things off. Champions do not make excuses, or become victims, or look for anybody else to manage them."

Champions Chelsea fell foul of an early challenge from Arsenal on Sunday in a gripping first glimpse of a potential Women's Super League title battle. 

Chelsea and Arsenal have accounted for seven of the 10 WSL championships to date, including the past four in a row, although the Blues were dominant last term. 

The beaten Champions League finalists entered the match at Emirates Stadium having suffered only one defeat in 43 league games and unbeaten in 39 away from home – a competition record. 

However, Arsenal, whose most recent defeat came against Chelsea in February, landed the first blow in 2021-22 with an impressive 3-2 win. 

Vivianne Miedema netted a record-extending 61st WSL goal to open the scoring, steering inside the near post for her sixth strike on opening weekends. 

Chelsea were level on the stroke of half-time through Erin Cuthbert but trailed again four minutes after the restart as Miedema turned provider for Beth Mead, who raced away and finished in style. 

Mead's eighth WSL goal against Chelsea – all at home – followed, meaning Pernille Harder's fine header proved merely a consolation as the Blues became the third team to lose the first game of a title defence, after Arsenal in 2013 and Liverpool in 2015. 

It was a first win in six against Chelsea for Arsenal, but they now have the outright most victories versus the reigning WSL champions (six). 

And the Gunners hope this will not be a one-off, as two-goal Mead told Sky Sports: "We are a team that want to fight for the title, so we won't make it easy for these teams. 

"Hopefully we can continue to do that for the rest of the season." 

She added: "[This win] has been a long time coming. We've had a lot of seasons where we've [fallen] short in these games." 

Arsenal Women have confirmed the signing of United States star Tobin Heath on a free transfer.

Heath, who spent last season at Manchester United, has won the World Cup twice and also has Olympic gold medals.

The 33-year-old, who has scored 31 international goals, was named in the FIFPro Women's World 11 in 2020 and won the US Soccer Female Athlete of the Year in 2016. 

Prior to her move to United in 2020, Heath had spent seven years with the Portland Thorns and had a spell with Paris Saint-Germain.

"Tobin's record speaks for itself. She's an incredibly talented player who will bring so much experience to our squad," said Arsenal's head coach Jonas Eidevall.

"This is an exciting time for the club, and I'm delighted we could secure Tobin's signing as we prepare to kick off the new season at Emirates Stadium on Sunday."

Heath, who plays on the wing or up front, scored four league goals for United last term. Arsenal's first game of the new season sees them take on champions Chelsea.