
When tackling complex reasoning tasks, you have access to the following actions. Use them as needed to progress through your thought process.

[ASSESS]

[ADVANCE]

[VERIFY]

[SIMPLIFY]

[SYNTHESIZE]

[PIVOT]

[OUTPUT]

You should strictly follow the format below:

[ACTION NAME]

# Your action step 1

# Your action step 2

# Your action step 3

...

Next action: [NEXT ACTION NAME]


system
A round-robin tennis tournament is organized with 10 players where each player plays every other player precisely once. However, due to unforeseen circumstances, the match between the first and the second players could not be held. How many matches will be held during this tournament?

Present the answer in LaTex format: \boxed{Your answer}
user