![ThoughtLog – Live! Juan Martín del Potro vs. Roger Federer at the World Tour Finals](http://www.changeovertennis.com/wp-content/uploads/2013/11/2013-11-08_2247-150x150.png)
ThoughtLog – Live! Juan Martín del Potro vs. Roger Federer at the World Tour Finals
Here’s where I’ll try to make sense of the winner takes all (well, not all – just a spot in the semis) between Juan Martín del Potro and Roger Federer.
![ThoughtLog – Live! Novak Djokovic vs. Juan Martín del Potro at the World Tour Finals](http://www.changeovertennis.com/wp-content/uploads/2013/11/2013-11-07_1337-150x150.png)
ThoughtLog – Live! Novak Djokovic vs. Juan Martín del Potro at the World Tour Finals
A live log of what goes through my brain as I watch Djokovic and Delpo duke it out in London.
![ThoughtLog – Live! Juan Martín del Potro vs. Richard Gasquet at the World Tour Finals](http://www.changeovertennis.com/wp-content/uploads/2013/11/2013-11-04_1407-150x150.png)
ThoughtLog – Live! Juan Martín del Potro vs. Richard Gasquet at the World Tour Finals
A running log of assorted observations during the Round Robin match between Juan Martín del Potro and Richard Gasquet at the 2013 World Tour Finals.
![ThoughtLog: Rafael Nadal defeats Jerzy Janowicz 7-5, 6-4 in Paris](http://www.changeovertennis.com/wp-content/uploads/2013/11/2013-11-01_0012-150x150.png)
ThoughtLog: Rafael Nadal defeats Jerzy Janowicz 7-5, 6-4 in Paris
A running log of observations during the Rafael Nadal – Jerzy Janowicz round of 16 match at the 2013 Paris Masters 1000.