The Saudi team's boycott is reportedly sparked by a bust of former Iranian military officer Qasem Soleimani which stood outside the tunnel.
The relationship between Iran and Saudi Arabia has been strained over a wide range of political issues and Soleimani, who was killed by a United States airstrike in 2020, was sanctioned by the Barack Obama administration for his alleged role in a plot assassinate the Saudi ambassador to the US in 2011.