Cape Town - Mpumalanga Black Aces were left frustrated in their bid to keep the heat on Absa Premiership rivals Mamelodi Sundowns as they were held to a goalless draw by Bloemfontein Celtic at the Mbombela Stadium on Saturday. The draw sees AmaZayoni drop behind Bidvest Wits to third on the log standings, while the Brazilians face Free State Stars on Sunday. Celtic started like a house on fire, but Aces quickly got into their stride and continued to dominate for most of the 90. Bryce Moon was a constant threat for the hosts and after he struck the upright on 16 minutes, the former 'Downs fullback was brilliantly denied by man-of-the-match Patrick Tignyemb, who produced an instinctive save from point-blank range. Serame Letsoaka's men, though, had their chances with Thapelo Morena and Tshepo Rikhotso forcing Shu-Aib Walters into successive saves on the cusp of half-time. Play was suspended for all of five minutes just before the hour mark due to heavy rain, with Celtic going close soon after the quick break. Again Morena led the attack from the counter, the winger playing a one-two with Lerato Lamola, but with the goal gaping, Morena scuffed his effort wide. Aces bossed possession in the final exchanges with Moon shooting over from inside the area with the final kick of the game, summing up a frustrating day at the office for Muhsin Ertugral's troops.