The top two of the Turkish Süper Lig, leader Sivasspor and Başakşehir, its closest follower from two points behind, will clash in the eastern province of Sivas in the highlight game of match week 21 on Feb. 9.
The host was very comfortable unlit last week, four points away with its closest follower but it was shaken by a 5-1 defeat against Gaziantep away.
Turkish Super League's second-spot Medipol Başakşehir, the dark horse of the season, handed defending champion Beşiktaş a major wound, if not vital, beating the leader 3-1 late on April 30.
The home side began the game at a fast pace and took an early 3-0 lead with back-to-back goals from 19-year-old Cengiz Ünder and Emmanuel Adebayor in the first 18 minutes.
Istanbul's Başakşehir swept aside title contender Galatasaray 4-0 on April 10 to continue its pursuit of leader Beşiktaş in a match that was marked by veteran striker Emmanuel Adebayor's stunning hat trick.
Coach Abdullah Avcı's charges remained within touching distance of Beşiktaş, which beat a strong Trabzonspor 4-3 on April 8.
Super Toto Super League leader Medipol Başakşehir, a giant killer turned title contender, is set to pay a crucial - if not historic - visit to Fenerbahçe on Jan. 22.
Başakşehir tops the standings with 39 points from 17 weeks so far and is the sole unbeaten team in the league.
However, coach Abdullah Avcı still avoids speaking of a title challenge and remains cautious.