Beşiktaş made a show in Belgrad
Following an uneventful opening, Beşiktaş gained control of the game and went ahead on 18 minutes with a 30-yard bullet from Veli Kavak that found the top corner of the Serbian giants net.
After Gökhan Töres solo effort hit the post and bounced back in, Demba Ba finished off a brilliant passing play with Oğuzhan Özyakup and Olcay Şahan just before the final whistle to give the Black Eagles a two-goal cushion before the interval.
The undefeated Turkish Super League leaders refused to slow down in the second half as Oğuzhan Özyakup made it 3-0 from near the six-yard line at the 52th-minute mark.
Few minutes later, Göhkan Töre converted Demba Bas through pass during a Beşiktaş break away and closed the scoring for the night.
With the four-goal victory the Black Eagles share the lead with Tottenham in Group C with 3 matches to play. They meet FK Partizan again in Istanbul on 6 November.
UEFA also has written Beşiktaş's wonderful play on their official website:
" Gökhan Töre-inspired Beşiktaş go joint-top in Group C
Veli Kavlak and Demba Ba on target in first half
Oğuzhan Özyakup and Gökhan strike in second
Partizan handed worst-ever European home defeat
Next games: Beşiktaş v Partizan (6 November)
Beşiktaş JK enjoyed their first trip to Belgrade immensely with Gökhan Töre leading by example as FK Partizan had a night to forget in UEFA Europa League Group C.
Veli Kavlak put the Black Eagles in front after 18 minutes, his dipping shot from outside the box catching everyone by surprise, and while Nikola Drincic drew a save from Tolga Zengin soon afterwards, Beşiktaş were unlucky not to go 2-0 up, Gökhan's right-footed strike beating Milan LukaÄ but smacking against the post.
Partizan looked to have steadied themselves as half-time approached, yet Olcay Şahan's smart ball completely unhinged the home defence, inviting Demba Ba to send Partizan into the break with a mountain to climb.
Beşiktaş did not change their approach after the interval, and while Petar kuletic and the similarly pacy Danko Lazovic did their best to whip up some resistance, Slaven Bilic's visitors welcomed the extra space to play around in.
Gökhan laid on a swift pass for Oğuzhan Özyakup to make it 3-0, and from then on Partizan appeared resigned to their fate on a soggy pitch. Ba duly rewarded Gökhan for his exertions with an assist for the classy winger to complete the scoring.
With their first Group C win, Beşiktaş have moved up to top spot in the section, while in the wake of their heaviest European home defeat to date, Partizan are moored to the foot of the table and yet to score in this season's group stage."