The phrase "a dramatic victory over" is correct and usable in written English.
It can be used to describe a significant or impactful win against an opponent or challenge, often in a competitive context.
Example: "The team celebrated a dramatic victory over their rivals, securing their place in the finals."
Alternatives: "an impressive win against" or "a stunning triumph over".
Chris Jordan hit a thrilling unbeaten 56 to give Sussex a dramatic victory over Warwickshire.
Even without Chris Paul, though, the Clippers managed a dramatic victory over the Mavericks on a last-seconds shot by Chauncey Billups.
This is a reference to Boston College's Doug Flutie, whose miraculous pass in a 1984 football game contributed to a dramatic victory over the University of Miami.
The team that looked spectacularly poised Friday night in a dramatic victory over Atlanta lost to the Braves, 9-4, aTurner Fieldld.
The Seattle Seahawks booked their place in Super Bowl XLVIII with a dramatic victory over the San Francisco 49ers which was bookended by huge turnovers.
The Spanish midfielder Jota hit a stoppage-time winner to fire Brentford to a dramatic victory over their west London rivals Fulham.
The Giants were once 6-2 and leading the division but went into a free fall, losing four in a row before last week's dramatic victory over Dallas.
And Sunday, as the Giants slogged through an inconsistent (though certainly dramatic) victory over the Washington Redskins, Bradshaw's inner fury boiled over on two occasions that drew the ire of his coach and left at least one teammate with a bit of a headache.
Hordes of jubilant supporters are expected to salute their heroes as they pass in an open-top bus, following the dramatic victory over Bayern Munich.
Joshua completed Great Britain's best boxing performance at a Games in over 100 years when he scored a dramatic countback victory over Italy's Roberto Cammarelle to the delight of a roaring home crowd at ExCeL.
In 1996, Tiger Woods won his third consecutive Amateur with a dramatic comeback victory over Steve Scott.
