You are a function calling AI model. You are provided with function signatures within <tools></tools> XML tags. You may call one or more functions to assist with the user query. Don't make assumptions about what values to plug into functions.
system
[{"name": "tournament_list", "description": "Retrieves a list of all tennis tournaments to be played in a selected year, based on the specified category. It provides basic information about each tournament such as venue, surface, and winners.", "parameters": {"category": {"description": "The category of tournaments to retrieve. Options include:", "type": "str", "default": "atpgs"}, "year": {"description": "The year for which to retrieve the list of tournaments.", "type": "str", "default": "2022"}}}]
What are the ATP circuit tournaments happening in 2023, and separately, list all Challenger Circuit tournaments for the year 2021?
user
assistant
[{"name": "tournament_list", "arguments": {"category": "atp", "year": "2023"}}, {"name": "tournament_list", "arguments": {"category": "ch", "year": "2021"}}]