Morocco's relationship with Saudi Arabia has been strained since May, especially after the variation of the position over the blockade against Qatar and the "detention" of the Lebanese Prime Minister Saad Hariri and Prince Al-Walid ben Talal. Yesterday in Paris, King Mohammed VI met the crown prince of Saudi Arabia, Mohammed bin Salman.
On Monday, the Saudi's Sports Authority's chairman tweeted saying that his country might not support the Moroccan bid to host the 2026 World Cup. Two days later, the Saudi ambassador to Rabat assured that such tweets shouldn't affect the diplomatic relations between the two nations.
Because of the support Morocco showed lately for Qatar, Saudi Arabia's vote for the 2026 World Cup will be based on what serves its own interest.