Tunis: Tunisian tennis player Aziz Dougaz (234th) has quit the Porto Open Challenger in Portugal Round 1, after his defeat, on Tuesday, against Belgian Alexander Blockx (295th) in two sets (4-6, 2-6). The Porto Open Challenger is played on hard courts and is endowed with pound 148.6 thousand. Source: Agence Tunis Afrique Presse