Caio Lucas' first-half goal was the difference in Sharjah hard-earned 1-0 win over Ittihad Kalba on Saturday.
The win means that Sharjah sit second with 26 points, while Ittihad Kalba are 11th with 13 points.
The hosts took the lead after 29 minutes through Caio Lucas' sensational finish.
The visitors tried to get back in the result, but their attempts was bravely locked by Sharjah's players.