Convinced is a synonym of Confident. Confident is the opposite of Regret. Regret is a synonym of Grief. Grief is a synonym of Suffering. 
Tennis is a type of Activity. Negotiation is a type of Activity. Negotiation is derived from Negotiate. 
Convinced <--Synonym--> Confident <--Antonym--> Regret <--Synonym--> Grief <--Synonym--> Suffering 
Tennis --IsA--> Activity <--IsA-- Negotiation --DerivedFrom--> Negotiate 