Machin Vitolo scored in the 88th minute for the Spanish side, not long after goalkeeper Premysl Kovar had been shown a red card.
Despite keeping the ball well in the early stages, Sevilla rarely threatened their opponents' goal and came closest through Coke's wild long-range effort 14 minutes in.
A few minutes later the home side took the lead with a flowing counter-attack. Serhiy Rybalka found Michael Rabusic with a clever through-ball and the midfielder made no mistake, firing the ball into the bottom corner.
The home side could have gone further ahead with two good chances for Josef Sural after the break.
The visitors made their advantage count as they poured forward after that, eventually getting their equaliser two minutes from the end. Gamerio poked the ball through to Machin, who fired under the goalkeeper from a tight angle.