The hosts at Dean Court defeated the Us 2-1, thanks to goals from Harris and Sophie Quirk.
They led by two at halftime, and while Oxford scored as the game entered stoppage time, the Cherries held on for the three points.
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Harris said she was ‘really happy’ with the result.
She told the Daily Echo: “We knew that Oxford were going to be a tough team, so especially in an occasion like this, at the Vitality, we knew we had to play our best and it got a little bit nervy at the end.
Charlotte Harris (Image: Richard Crease)
“But I think the two goals early on helped settle us and I honestly think that we could have and should have scored more.
“So it was a little bit disappointing to concede, but to get the three points is what's important, and especially with the other results that have gone on the table, to go back to the top of the league just puts us in a great position.”
Reflecting on their defensive performance, Harris said: “As a defender, we always want to keep clean sheets, but I think we knew that Oxford are a really strong team and to only concede one against them and score two, that's ultimately what matters, getting the three points.
“I think the team we've got this year are all ready to put their bodies on the line. And we do take great pride in being defensively strong.
“We know we've got people up front who are going to score the goals and we have faith in them, and they also have faith in us that we're going to do our job at the back.
“So you've got people at the back who are relentless every game. And for me especially, I'm so glad I was able to score a goal, but as a defender, it's really important for me that we're defensively strong.”
It was a very nervy end after Oxford’s goal, with ten added minutes after the 90.
Charlotte Harris (Image: Richard Crease)
Harris said they felt the nerves, but there was “100 per cent relief” at full time.
“The pitch is huge,” she said.
“It's an amazing opportunity to play here, but definitely different than playing from Ringwood. So I know we were all hanging on at the end, and in those moments, I think it can go one way or the other.
“When they scored the goal, we could either crumble or we could really come together and be united and just get the game done.
“And I think it's really good that we were able to finish on a positive note. And again, at the end of the day, it's the three points that matter.”