Premise: The Emami Kolkata Open ATP Challenger Tour (formerly known as State Bank of India ATP Challenger Tour) is a professional tennis tournament played on outdoor hard courts. It is currently part of the Association of Tennis Professionals (ATP) Challenger Tour. It is held annually at the Bengal Tennis Association Stadium in Kolkata, India since 2014.
Hypothesis: The Emami Kolkata Open ATP Challenger Tour was once called State Bank of India ATP Challenger Tour where professional players play on courts that are neither within walls and nor have ceilings.