[USER (data scientist)]: That's great. I need to compare the updated odds for the affected matches to the original odds. Please provide a dataframe with Match IDs, Original Odds, Updated Odds, and Comparison Metrics (Difference and Percentage Change).
My template of code snippet is:

---BEGIN CODE TEMPLATE---

import pandas as pd
import numpy as np
import pickle
from decision_company import read_csv_file, fetch_column

atp_tennis = read_csv_file('atp_tennis.csv')

# YOUR SOLUTION BEGIN:
<code1>
[GENERATE YOUR CODE] 
</code1>
# YOUR SOLUTION END

print(updated_odds_df)

# save data
pickle.dump(updated_odds_df,open("./pred_result/updated_odds_df.pkl","wb"))

---END CODE TEMPLATE---

[YOU (AI assistant)]: To compare the updated odds for the affected matches to the original odds and provide a dataframe with Match IDs, Original Odds, Updated Odds, and Comparison Metrics, you can use the following code:

# MY SOLUTION BEGIN:
