Table:
text: WTA International tournaments
Events
Events
Tournament Also_currently_known_as City Country Court_surface Defending_champion
Seoul KDB Korea Open Seoul South Korea Outdoors hard Agnieszka Radwanska
Guangzhou GRC Bank Guangzhou International Women`s Open Guangzhou China Outdoors Hard Shuai Zhang
Linz Generali Ladies Linz Linz Austria Indoors hard Angelique Kerber
Osaka HP Open Osaka Japan Outdoors hard Samantha Stosur
Luxembourg BGL Luxembourg Open Luxembourg City Luxembourg Indoors hard Caroline Wozniacki

Question: How many WTA International tournaments are currently also referred to as the HP Open?