In the WSL last season - Carpenter's first in blue - we drew at the Emirates Stadium before losing at home to our rivals. Then came a two-legged knockout clash in the Women’s Champions League quarter-final. With the atmosphere at fever pitch in both legs, the Gunners took a 3-1 lead into the decisive leg back in SW6, despite a closely-fought battle.

The season before we had overturned a two-goal deficit against Manchester City at the Bridge in the UWCL quarter-final, securing a famous 3-0 victory. The whole stadium believed we could do the same again against Arsenal. A superb performance followed, but Sjoeke Nusken's late goal wasn't enough for us to advance.

That’s where Carpenter picks up the story as we prepare to take on Arsenal at the Bridge once more, this time in the Women’s Super League.

‘It's a massive rivalry,’ she tells us. ‘Even before I joined the club, I remember I would always watch Arsenal against Chelsea. It's just one you'd want to put on TV. It’s always a good match, and always a high-tempo game with lots of things happening. It’s probably the biggest rivalry in the league.

‘None of us will ever forget that second leg against Arsenal, because of how well we played and also beating them as well. I guess we still want that bit of revenge for not going through to the semi-final of the Champions League. I'm sure that's in the back of our minds as well.

‘Arsenal are a great team, they have great players, and I'm sure they'll be up for the game. They’ve not been winning their recent matches in the league, so I'm sure they'll be hungry to get more points. It'll be a big game, so we'll have to turn up, and everyone will have to be at their best to win.’

Renee Slegers’ side have scored just twice in their opening three WSL games. After a 1-0 win over Brighton and Hove Albion, and a goalless draw with newly-promoted Crystal Palace, they needed a last-minute goal to grab a point against Manchester United.

Yet as Carpenter explains, the team is unconcerned with any previous form, especially as the level of competition in the league is constantly increasing.

‘For us, we just need to focus on ourselves and play the football that we've been playing this season,’ she continued. ‘I think we've had really great performances in all three games. Now it's just about finishing off all the chances we're creating. We just need to keep playing our game plan.

‘Every game is big in the WSL. Right now is probably the strongest the league has ever been. Anyone can win on any given day. Anyone can take points from anyone, and that's what's so good about this league.

‘It's so competitive, and you have to be at your best every weekend to get the three points. That's why I think it's the best league in the world.’

Carpenter has been in top form so far this season. She earned the Player of the Match trophy against Birmingham City, and was also voted Star of the Match for her performance that day by our own supporters.

Ahead of one of the biggest tests of the season, the Australian explained why she is revelling in the challenge of playing at the highest level for the Blues.

‘It’s why I wanted to move to England, for sure,’ she says. ‘To play for Chelsea is to play in the best league and to be tested every weekend. Not just against Arsenal, but every weekend it's a test, and you have to bring your best game to get the three points.

‘That’s what I'm enjoying about this league: the expectation and also the pressure to perform. It’s really helped me personally to grow as a footballer on the pitch.

‘I've had a good pre-season with the team, and I guess I'm in a more attacking role these first couple of matches, so it's been nice to get forward and probably more on the attack.’

We have declared the fixture against Arsenal a ‘Blue Day’, meaning there will be special events happening in and around the ground so that our supporters can show their allegiance in a very visual way on Sunday.

• Answer Ellie's call and get your tickets for Arsenal at the Bridge!

Fans are being encouraged to wear Chelsea blue, bring their scarves and wave the flags that will be left on the seats. For those in the West Lower, there will be cards provided to make a mosaic as the teams walk out.

And as the derby takes place during a break in men’s fixtures for internationals, it’s the ideal time for all Chelsea fans to show that London is blue. Ellie agrees.

‘It'll be good to see a sea of blue in the stands,’ she says.

‘Hopefully not many red shirts! It'll be nice to see Stamford Bridge full of blue, cheering for us, and hopefully we’ll get a great crowd.’

You can still attend today's huge London derby clash, with kick-off at the Bridge at 4.30pm!