Secreted effector that interacts with and inhibits the pathogenesis-related P69B subtilisin-like serine protease of host tomato (PubMed:15980196). Inhibition of host proteases by a pathogen extracellular protease inhibitor forms a specific type of defense-counterdefense mechanism between plants and microbial pathogens (PubMed:15980196). Interacts with host subtilisin-like protease P69B. Localizes to host apoplast where it targets defense proteases for inhibition. Expressed in zoospores (PubMed:15096512). Expressed during host infection (PubMed:15980196).