Fabiański has had limited appearances this season for Arsenal and these have been limited to cup games. He is a capable backup.
This has been a solid season for Szczęsny, with only a few wobbles, notably against Swansea City, Fulham away and Spurs away.
His standout performance was against Liverpool in March, when he singlehandedly kept Arsenal in the game. It was here he made a double save from a penalty by Dirk Kuyt.
Another notable performance was against Udinese at the Stadio Friuli, where he made a crucial penalty save to ensure Arsenal progressed to the group stage of the Champions League. It also helped mitigate the crisis situation at the time at Arsenal.
Another notable game was against Sunderland at the Emirates, where an important save ensured Arsenal got maximum points in that match. This also helped dissipate the crisis atmosphere at Arsenal at the time.
Squillaci has had a worse season than last. He was infamous in the Fulham loss at Craven Cottage, when he provided the assist for Fulham's winner.
Prior to this, he had a solid game for Arsenal in the Carling Cup match against Manchester City. One thought that marked the turnaround in his fortunes at Arsenal.
As it is, he may be sold to this summer.
Djourou helped out greatly during the full-back crisis, but never seemed assured in this role. He has given away two crucial penalties this season, one at Fulham and the other away at AC Milan.
His last two matches, though, have been promising.
Mertesacker is an enigma to some who don't seem to appreciate his game. But considering that he had to hit the ground running at Arsenal in a more physical league, he performed rather admirably.
Despite his lack of pace, he has a knack for anticipating developing situations in a game, which is why he's such a good defender.
But again, it is a fact that his critics don't see. It has been a good debut season for the German international.
Vermaelen, like Djourou, helped out with the full-back situation in the first half of the season. He reverted back to his preferred central position when Mertesacker got injured.
He has had solid performances this season, with the exception of the Arsenal-Fulham match at the Emirates, the AC Milan match at the San Siro and the QPR match at Loftus Road.
His most memorable match this season is the Newcastle match at the Emirates, in which he scored the winning goal on the final minute of added time.
Koscielny has been Arsenal's most consistent defender this season. He has put in one solid performance after another.
The highlight of his season was his goal against AC Milan at the Emirates to kick-start Arsenal's quest for self-redemption.
The only blight to his record this season is the own-goal he scored against Liverpool at Anfield, which I put down to his simply wanting to match Vermaelen in the own-goal department. Vermaelen, as the reader might recall, scored an own-goal of his own against Fulham at the Emirates.
Before injury, for the better part of the season, Jenkinson proved a capable deputy for the injured Bacary Sagna.
In fact, his crosses were eye-catching.
Since his return from injury, he has had little opportunity to improve his stock at Arsenal, but that the promise is there is without doubt.
Sagna's injury early in the season meant he would miss most of the season. His absence contributed to Arsenal's dip in form in the winter.
Aside from his difficult performance in the loss to Wigan, Sagna returned as if he hadn't been away at all. There's no doubt that he is the best right-back in the Premier League and one of the best in Europe.
His most memorable game this season must be the drubbing of Spurs at the Emirates, where his goal kick-started Arsenal's revival.
The good, the bad and the ugly describe Andre Santos.
The ugly is his knack at committing niggling fouls at the wrong moment of a match, which usually is in the dying minutes of a match Arsenal are winning, but must hang on to do so.
The bad are his defensive lapses which seem to arise mostly from lack of concentration than anything else.
A good example is the Chelsea-Arsenal match at Stamford Bridge, where Santos' first-half performance was riddled with misplaced passes, mistimed tackles and a lack of positional awareness.
The good is his uncanny ability to make clean tackles. The Chelsea match is still a good example, where Santos turned in an excellent defensive performance in the second half, winning all of his tackles, except when he committed a foul resulting Juan Mata's goal.
Another good, of course, is his offensive ability, which has seen him play twice in an advanced position.
Injury interrupted his adjustment to the team, but all things considered, this hasn't been a bad debut season for him at all.
Gibbs' injury contributed to Arsenal's defensive crisis during the winter. The blight in his season is this problem with injury. Barring this, he is a very capable defender.