Besiktas started their quest to qualify for the knockout stages of the Champions League in fine style as they claimed a surprise 3-1 win at Porto on Wednesday.
The Super Lig champions have never gone beyond the group stages of Europe's premier club competition in its modern guise, but made their ambitions clear this close-season by bringing in the likes of Pepe, Gary Medel and Alvaro Negredo.
And Besiktas now sit top of Group G after seeing off Porto at Estadio do Dragao, with Cenk Tosun's somewhat fortuitous long-range strike putting last season's Europa League quarter-finalists into a lead they would not relinquish.
Anderson Talisca, on loan from Porto's Primeira Liga rivals Benfica, will have drawn further ire from the home fans when he headed Besiktas in front in the 13th minute.
Porto levelled eight minutes later through Dusko Tosic's own goal but Tosun quickly hit back in the 28th minute.
Former Real Madrid goalkeeper Iker Casillas managed to let Tosun's effort evade his grasp, and he was equally at fault as Ryan Babel scored Besiktas' third goal of a victory that moves them two points clear at the top after RB Leipzig and Monaco drew 1-1.
Besiktas had the better of an open start to proceedings and Babel saw a curling effort deflected over the crossbar before Talisca broke the deadlock.
The Brazilian timed his run into the box perfectly to meet Ricardo Quaresma's right-wing cross and power a close-range header beyond Casillas.
Porto responded well and Oliver Torres hit the post at the end of an attack started by a magnificent long ball from Casillas.
And the hosts were gifted an equaliser two minutes later as Tocic headed Alex Telles' corner from the left in at the near post.
Jesus Manuel Corona then had a tame effort from a tight angle kept out by Fabri as Porto looked to complete the turnaround.
But they instead fell behind once more, with Casillas at fault as Besiktas retook the lead.
Tosun let fly with a long-range swerving effort that Casillas failed to keep out despite getting a hand to the shot.
Tiquinho Soares curled narrowly wide from 20 yards out as he sought to restore parity once more before Oguzhan Ozyakup slipped and fired wide at the other end after finding himself in space in the box.
Porto made a double change before the start of the second half as Otavio and Andre Andre were brought on for Torres and Corona.
And they increased the pressure on the Besiktas goal as Tiquinho latched on to a Yacine Brahimi throughball only to be denied by Fabri, before Ivan Marcano had a goal-bound header blocked on the line.
Besiktas weathered that storm, though, and the visitors added late gloss to the scoreline as another Casillas error allowed Babel to make the game safe by finding the bottom-left corner.
|Sock, Chung through at Delray Beach|
|Klopp tactics behind my form – Salah|
|Young: Man United can win Champions League|
|Harper refuses to talk free agency, says he´s focused on this season|
|Messi is best but ´not invincible´, says Pedro|
|It´s a red card – Guardiola accepts Delph sending off amid City´s Wigan woe|
|Goffin hopeful of ´fast recovery´ after nasty eye injury|
|Aguero lashes out at fan as tempers flare after Wigan stun Man City|
|Grigg revels in dousing Manchester City´s fire|
|Dzumhur saves four match points to down Kukushkin|
|Wigan Athletic 1 Manchester City 0: Grigg ends Guardiola´s quadruple dream|
|Edinburgh to finish season at Murrayfield|
|Messi the best but don´t forget Suarez, says Chelsea boss Conte|
|I need a great game – Hazard aiming for Messi heights|
|AFC Champions League Review: El-Arabi´s brace seals Al Wahda´s fate|
|Dubai disappointment for Radwanska|
|Patriots knew Butler would be benched, says McCourty|
|Barcelona boss Valverde tells Chelsea: History counts|
|Schmidt departs as Wolfsburg face relegation fight|
|Madrid, Barca & PSG are Champions League favourites, says Heynckes|
|I was at rock bottom – Brook opens up on depression battle|
|Rashid in form as Afghanistan rout sorry Zimbabwe|
|Toulon president charged over Bastareaud comments|
|Biggar, Halfpenny and Faletau all fit as Wales given clean bill of health|
|Hughes availability ´absolutely huge´ for England, says Alphonsi|
|Former football coach Bennell sentenced to 31 years|
|Why didn´t Jimmy Butler play in NBA All-Star Game?|
|Returning Ringrose added to Ireland Six Nations squad|
|Hummels wary of ´top European team´ as Bayern prepare for Besiktas|
|In-form Kvitova withdraws from Dubai|
|WATCH: ´Crazy´ Evra drives to West Ham training in London cab|
|Barca clash a chance for Chelsea ´to do things right´, proclaims Rudiger|
|Lucas claims Tottenham can win Champions League|
|Federer the ´complete player´ with number-one return - Schuettler|
|LeBron relishes one more link-up with Irving|
|Barcelona tie will not decide Conte´s Chelsea future, says Deco|
|Cordner signs bumper deal with Roosters|
|Lewandowski won´t be distracted by Real Madrid rumours|
|Bennett signs on until 2019 with England|
|Man Utd must not underestimate Sevilla - Navas|
|Coleman demolishes 20-year-old 60m world record|
|Red Bull reveal ´special edition´ livery on 2018 car|
|Iniesta will not be made welcome at Stamford Bridge, warns Azpilicueta|
|Ballack sees ´a big difference´ between Bundesliga and Premier League|
|Karmichael Hunt faces no conviction, but will remain sidelined|
|Betis boss would have preferred to face Madrid´s BBC|
|Chelsea v Barcelona: Messi´s blues against the Blues|
|James leaving Madrid was the best thing, says father|
|He´s looking good – Zidane thrilled with Ronaldo|
|It needs to take 30 seconds – Matic wants quicker VAR|
|Team LeBron edges Team Stephen in thrilling All-Star Game|
|McIlroy sees progress despite failing to contend at Riviera|
|Silver supports NBA players speaking out on social issues|
|Mickelson ready for Masters after third straight top-six finish|
|Gattuso: My job is to be the players´ nightmare until season´s end|
|I wasn´t good enough – Guardiola reveals Wigan rejection|
|Dillon reigns supreme with overtime win at Daytona 500|
|Bubba Watson ends drought with third Genesis Open title|
|Brazilian derby between Vitoria and Bahia abandoned after red-card frenzy|
|Anderson ends barren spell with New York Open triumph|
|It was crazy, but I like that - Zidane revels in eight-goal Betis thriller|
|Asensio credits Zidane for Madrid´s thrilling Betis comeback|
|Zidane hopeful over Marcelo hamstring injury|
|Overton replaces injured Plunkett for Blacks Caps ODI series|
|Bonaventura claims Milan can catch Inter|
|Bravo for Claudio! Guardiola to pick keeper at Wembley|
|Mourinho hoping for reinforcements at Sevilla|
|´Quick-healer´ Groves hopeful over shoulder injury|
|Real Madrid become first side to score 6,000 goals in LaLiga|
|Real Betis 3 Real Madrid 5: Asensio at the double in LaLiga classic|