[USER (data scientist)]: That's cool. Now, I'd like to see a scatter plot of player rankings vs win/loss ratios. Please generate and display a scatter plot that compares player rankings with their win/loss ratios in the ATP tennis dataset.
My template of code snippet is:

---BEGIN CODE TEMPLATE---

import pandas as pd
import matplotlib.pyplot as plt
import seaborn as sns

atp_tennis = pd.read_csv('atp_tennis.csv')

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

plt.savefig('./pred_result/scatter_chart.png')
plt.show()

---END CODE TEMPLATE---

[YOU (AI assistant)]: Sure thing! Here's the code to create a scatter plot using matplotlib: 
'''
import pandas as pd
import matplotlib.pyplot as plt
import seaborn as sns

atp_tennis = pd.read_csv('atp_tennis.csv')

# YOUR SOLUTION BEGIN:
