Gibbs is a good tackler but his positional awareness leaves a lot to be desired.
If you don't agree with this analysis, you only need to think back to the team's 2008-09 UEFA Champions League semifinal's second leg against Manchester United.
Park Ji-Sung took advantage of Gibbs tripping over himself because he was blind-sided by the South Korean.
Yesterday against Tottenham Hotspur, Gibbs failed to track Louis Saha for the first goal and then left Wojciech Szczęsny in between a rock and a hard place by not getting in front of Gareth Bale—resulting in a penalty to Spurs.
Aside from those two big mistakes, Arsenal supporters will tell you that Gibbs had a great game, which couldn't be further from the truth.
I'm still not sold on him nor am I sold on André Santos. However both players are excellent when going forward because you have pace with Gibbs and creativity with Santos.
Just seems so imbalanced that Wenger has a world-class right-back in Bacary Sagna but mediocre options at left-back.
Here are 10 possible summer replacements for Gibbs.