The visitors took the lead in the 50th minute. Sibusiso Zuma caught Westerveld way off his line to chip the ball from range into the back of the net.
Koen van de Laak let rip with a powerful shot at goal, but the impressive Williams managed to tip the ball around for a corner in the 72nd minute.
Ajax splurged a variety of chances until they eventually got it right in the 79th minute, when Terror Fanteni turned on the ball and sliced it into the far post to level matters.
Alcardo van Graan felt he had been pulled down in the box but the referee waved play on, as they played out to a 1-1 draw.