Matej Dodig will beat Saba Purtseladze and advance in Hamburg on August 14. Dodig will take advantage of Purtseladze's recent struggles, which include a 6-1, 6-4 loss to Richard Antoni on August 9 and a 7-5, 7-5 loss to Denis Yevseyev on August 10, while Dodig is listed in the Challenger Hamburg fi…