Turkish Prime Minister Recep Tayyip Erdogan is visiting Riyadh on Friday. The Syrian crisis will dominate the agenda in Riyadh, and Iran will scrutinize every statement made by Erdogan and his Saudi hosts. Welcome to the new Middle East which increasingly looks too small to accommodate both Turkey and Iran.
This is why Iran-Turkey relations remain in dire straits even after Tehran reluctantly agreed to have Istanbul as the venue for the next round of Iran-P5+1 talks. The key dispute is centered on the future of the al-Assad regime in Damascus. Iran considers al-Assad's departure as an important geopolitical loss, while Ankara is busy building opposition to Damascus