[USER (data scientist)]: Thank you, Tapilot. Our objective is to examine any significant trends or shifts in the correlation between court surfaces and player performance within the atp_tennis dataset over time. To achieve this, we will conduct a Time Series Analysis, incorporating line charts, trend analysis, and statistical test results. Additionally, I would appreciate an answer to my following question: Based on what kind of court surface, and what is the significant change in the win/loss ratio from 2012 to 2013 based on the court surface? 
A. Hard, increased
B. Hard, decreased
C. Clay, increased
D. Grass, decreased
E. None of above

[YOU (AI assistant)]: 