Second-placed Galatasaray take on third-placed Besiktas in the Istanbul derby on Sunday in the Super Lig.
Just one point separates the two sides. The Lions are two points behind Basaksehir while Besiktas are three behind the leaders.
A victory for either side could see them move into first place in the league standings.
Bulent Yildirim will officiate the all-important derby clash.
He will take charge of his 13th derby in the process. Yildirim has officiated four matches between these two sides which finished in two draws and a win for each team.
These are the results of the derby games Yildirim has refereed.
| 2009-10 | Galatasaray-Beşiktaş | 3-0 |
| 2010-11 | Fenerbahçe-Galatasaray | 0-0 |
| 2011-12 | Fenerbahçe-Galatasaray | 2-2 |
| 2011-12 | Galatasaray-Beşiktaş | 2-2 (Süper Final play-off) |
| 2012-13 | Beşiktaş-Galatasaray | 3-3 |
| 2013-14 | Galatasaray-Fenerbahçe | 1-0 (Süper Kupa) |
| 2013-14 | Fenerbahçe-Galatasaray | 2-0 |
| 2013-14 | Galatasaray-Fenerbahçe | 1-0 |
| 2014-15 | Beşiktaş-Fenerbahçe | 0-2 |
| 2016-17 | Galatasaray-Beşiktaş | 0-1 |
| 2017-18 | Fenerbahçe-Galatasaray | 0-0 |
| 2018-19 | Beşiktaş-Fenerbahçe | 3-3 |
Neither side has a lost a game in which he has been referee this season.
Besiktas head into the game having won their last five games and also beat Galatasaray 1-0 the last time they met.
The Lions meanwhile have drawn two and won one of their last three games.
Friday 3 May
20:30 Demir Grup Sivasspor – Medipol Başakşehir (Halil Umut Meler)
Saturday 4 May
16:00 Ankaragücü – Çaykur Rizespor (Suat Arslanboğa)
16:00 BB Erzurumspor – Bursaspor (Cüneyt Çakır)
19:00 Kasımpaşa – Fenerbahçe (Halis Özkahya)
Sunday 5 May
16:00 Akhisarspor – Evkur Yeni Malatyaspor (Hüseyin Göçek)
16:00 Göztepe – Antalyaspor (Mete Kalkavan)
19:00 Galatasaray – Beşiktaş (Bülent Yıldırım)
Monday 6 May
20:00 Aytemiz Alanyaspor – Atiker Konyaspor (Alper Ulusoy)
20:00 Trabzonspor – İstikbal Mobilya Kayserispor (Fırat Aydınus)