Ewan overcame a late attack from Sam Bennett (BORA-Hansgrohe) on a short, sharp climb into the Istanbul finish to take a convincing win in the final stage of the Tour of Turkey.
Bennett launched his move with just over a kilometre left in the race, immediately getting a gap on the leadout train of Deceuninck-QuickStep riders, as they scrambled to bring their key sprinter, Fabio Jakobsen, back on terms.
Ewan surfed wheels as Deceuninck riders kept Bennett close and jumped across to the spent Irishman, immediately passing him and claiming a comfortable win with no competitor in the sprint to the line.
The first day we came here we looked at the finish," said Ewan after the race.
"Then I looked at some video of how the stage went in the last few years. I almost expected Sam to do it again after what he did last year.
"Deceuninck had their riders there and when I thought they were fading I jumped and was able to get round him (Bennett). I had quite a good gap coming into the straight and I held on and won."
Ewan came into the race a bit underdone as he looked to save his form for his first Grand Tour appearance for Lotto Soudal at the Giro d'Italia, but he has ended up with a return of two wins against a strong group of sprinters include the in-form Bennett and a formidable Deceuninck-QuickStep outfit.
"When I came here I said I didn't think I'd win anything," said Ewan, "so it's really gratifying to win for me and the team and pay off the hard work they've done throughout the race."
Felix Grossschartner (BORA-hansgrohe) finished safely on the stage to maintain his lead in the general classification standings, taking the overall Tour of Turkey win by 19 seconds over Valerio Conti (UAE Team Emirates) with Merhawi Kudus (Astana) a further six seconds in arrears.