And there was a debut win for Millie Tomlinson in the ladies' event as some of the world's top players descended on Lee-on-the-Solent for the prestigious tournament that has been running for 10 years.
Gosport-based Pett, who was unseeded, overcame Portugal's Rui Soares 3-1 in a highly-competitive men's final, while world-number 24 Tomlinson defeated fellow England player Lilly Taylor 3-0 following some clever squash.
Pett, who is a former world no 48, reached the men's final after a great battle with home favourite and one-time coach, Tim Vail, in the last four.
Both players served up a great match that consisted of some creative and fast-past squash, only for the former to book his spot in the last two thanks to a 3-1 scoreline.
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Top-seed Soares, currently ranked 91 in the world, saw off up-and-coming Englishman Tom Walsh 3-0 in his semi-final - and he took that momentum into the first set of the finalÂ by taking a 1-0 lead.
However, a short break and some words of advice saw Pett come back with a new plan.
Moving the ball deeper, quicker and capitalising in the middle of the court, Pett managed to level the score, before taking a 2-1 advantage.
The fourth set saw both players unwilling to give much ground, but Pett fought deep to close out the match 3-1.
Tomlinson's route to the ladies' final consisted of a 3-0 semi-final win against Celine Walser.
Meanwhile, Taylor got the better of teenager Alice Green 3-1 to set up a mouthwatering finale.
Tomlinson, the more experienced of the two, showed great quality from the beginning.
Taylor, though, played some clever squash, out-manoeuvring her rival with her deft short game and quick hands around the court.
But a few mistakes crept into the match at crucial parts of the game for Tomlinson to capitalise.
She then ran out a worthy winner to claim her first Solent Classic tittle.