The phrase "although she beat" is correct and usable in written English.
It can be used to introduce a contrast or exception in a sentence, typically in a context where one action or outcome is surprising given another.
Example: "Although she beat her previous record, she was still disappointed with her overall performance."
Alternatives: "even though she won" or "despite her victory".
Although she beat a man just once in competition, in that Reno tournament, it was enough to validate what she had gone through.
Although she beat back a leadership challenge from Mr. Rudd early in 2012, she has since slid in the polls against Tony Abbott, the leader of the opposition Liberal-National coalition.
Although she beat back a leadership challenge from Mr. Rudd early in 2012, she has fallen sharply in the polls since announcing in January that federal elections would be held in September.
Although she "beat the breast cancer odds," as Brenner once said, she resigned her post because of amyotrophic lateral sclerosis, a degenerative nerve disorder.
Helen Osman, who runs N21 Online, is one of the driving forces behind the Save Our Green Lanes campaign, and ran as an independent in last May's local elections on an anti-Mini Holland ticket (she came 11th out of 12 candidates with 425 votes, although she did beat the Lib Dems).
Although Zenyatta beat up on suspect competition earlier in the year, she won when it counted most in the most difficult race in the world to win.
"Jo's currently number one and she's won it the last few years so although I beat her in the round robin it doesn't mean anything when you get to this stage.
Although Williams beat her eight straight times from the summer of 2001 to the summer of 2003, she lost in straight sets to Capriati in the semifinals in Rome earlier this month.
Although he beat her, Maryam had to stay with him.
Although it beat that level, it fell short of 100 per cent.
Although Szczesny beat away Christian Benteke's effort, the Belgian nodded in the rebound.
