What a difference a year makes: last year, Roger Federer and Rafael Nadal pulled out of the tournament, whereas Novak Djokovic crashed out in his first match, losing to Sam Querrey in the second round.
This year for the first time, the Bercy quarter-finalists are the eight men qualified for the ATP World Tour Finals in London.
I’ve had tickets for the day session and get to watch Djokovic-Wawrinka and Federer-Del Potro. Here’s a quick recap:

Djokovic vs Wawrinka

6-1 6-4 for Djokovic. The score is flattering for the Serb but doesn’t really reflect the match.
Wawrinka fought a lot and had a lot of opportunities to break Djokovic’s serve but the world number 2 was simply more consistant.

Pics of the match.

Federer vs Del Potro

Roger Federer has had one of his worst season ever in 2013, but he seems to have found his form back of late. And indeed, for a set and a half, Federer looked like his old self: effective on serve, aggressive on return, with a will to finish the points at the net. 6-3 for Federer.
First break points for Del Potro at 5-4 in the second set and the Argentinian levels the match.
Both players exchange beaks of serve at the start of the third set but the 17-time Grand Slam winner goes for his shots and has the last word: 6-4 3-6 6-3 for the Swiss.

Pics and videos of the match.

Nadal vs Gasquet

Finalist in 2007 (loss to Nalbandian), Nadal hasn’t made the trip to the end-of-year Paris tournament in four years. But this year, with the world number one ranking at stake, he seems determined to do well at Bercy.
After two not so convincing victories over Marcel Granollers and Jerzy Janowicz, Rafa cruised past Richard Gasquet in straight sets 6-4 6-1.
Despite this loss (Gasquet is now 0-12 against Nadal), it was a good week for the Frenchman who qualified for the ATP Finals for the second time of his career.

Ferrer vs Berdych

As usual, the 2012 champion kind of flew under the radar, but David Ferrer overcame Tomas Berdych 4-6 7-5 6-3 to advance to the last four and set up an all-Spanish semi-final.

Read the quarter-finals recap here.

Read the quarter-finals recap here.

Tougher match than expected for Rafa who needed two tight sets to defeat countryman Marcel Granollers.
Nadal struggled to find his rhythm and made a lot of unusual forehand errors.

Next opponent for Nadal: last year surprising runner-up Jerzy Janowicz.

Rafa’s interview after the match:

More videos of Nadal’s second round match.

Without a doubt the most boring match I’ve watched all week. Both players have the same playing style: big serve with solid groundstrokes and I had the feeling they were playing the same point over and over again. The most entertaining part of the match was players challenging the calls, go figure…

19 aces for Cilic who made a lot of errors on important points (easy volleys in the net, smashs 3 meters behind the baseline…) and a 6-4 7-6 for the recent Basel tournament champion, Juan Martin Del Potro.

Bercy is Cilic first tournament after a four-month ban following a failed doping test.

Perfect first set for Tsonga who serves well and overpowers Nishikori with his massive forehands.
Tsonga tires a bit in the second set, his serves is less effective and Nishikori is up 4-1. Tsonga fights back and concedes the tiebreaker, and the Japanese levels the match at one set apiece.
The 2008 Bercy champion shows more signs of fatigue in the final set but manages to get two match points in the tiebreaker: one is wasted by a double fault and one is saved by an ace on second serve. Nishikori wins the match on another double fault by Tsonga.

Nishikori is a really interesting player to watch: really quick with good hands he only needs a bit more power and more experience to crack the top 10.