Riyad Mahrez, the favorite player of Pep Guardiola who had a key performance when he was playing for this coach has had an amazing performance in Saudi Arabia since he joined there and he proved he was worth all the money he spent on this player.
He played in the game between Al Tai and Al Ahli and he scored one goal for his team. So far in this season, he has scored nine goals for his team and eight assists which is amazing for this player who left Manchester City after five years of playing there.

He decided to leave Manchester City and enjoyed money in Saudi Arabia. With lower level of Saudi Professional League, it's not big problem for Riyad Mahrez to show his ability there. He has better body and fitness than Neymar, less sensitive with injuries so his contributions for his clubs are bigger than what Neymar did for Al Hilal.
9 goals is an amazing stats but I don't know are there any goal from 9 goals from penalties?
What Riyad Mahrez has given to his club is not enough to make Al-Ahli a club that competes for the title because they are already quite far behind the current leaders, even from the second-placed team they are already 9 points behind
Because Al Hilal and Al Nassr are too strong and dominating the Saudi Professional League. To win a league title, a club need more than a single star player and Riyad Mahrez is only an attacking player, not a striker, a goal machine to decide a title race.