Constantin has been repeatedly booed by sections of the crowd since taking over as interim coach earlier in the season.

After getting fed up with the jeers, the under-fire president banned the third-class fans from attending home matches.

Although he got his fair share of criticism, the 36-year-old keeper urged Constantin to allow Sion's supporters to attend the next matches.

The former Ahli guardian believes the presence of spectators is a matter of the utmost importance, because they boost the team and help them pull off better results.

The Swiss club said on their official website that Constantin will consider Al-Hadari's request carefully.