In Saturday's La Liga, Huesca drew 1-1 with Valencia away and Siovaz started the game.
Theovas scored a goal in 63 minutes and he helped Huesca to tie the score 1-1.
This is the 100th time Siowas has played in La Liga. He also became the first Greek player to achieve this achievement. In addition, he was also the first Greek player to score goals for different teams in La Liga.
Theovas celebrated his 32nd birthday this month. He joined Leganes on loan from Olympiacos in the 2017 winter transfer window, after which he was officially bought out.
Theovas failed to help Leganes succeed in relegation in La Liga last season. He joined Huesca from Leganes this summer and his transfer fee is 1 million euros.