Xhaka joined Arsenal in the summer from Bundesliga outfit Borussia Monchengladbach, costing the Gunners around £35million.
But the Swiss midfielder has struggled to hold onto a first-team spot this season, starting just 16 Premier League games so far.
Didi Hamann disappointed with Granit Xhaka's start at Arsenal
Arsenal fans discuss Granit Xhaka
Wed, February 15, 2017
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Arsenal fans are not impressed with Granit Xhaka
The 24-year-old has also missed seven games across all competitions after picking up five yellow cards and two straight reds.
And former Liverpool midfielder Hamann has been far from impressed by Xhaka's start to life in England.
Hamann told PaddyPower: "He’s been a major disappointment. He dives in and gets himself sent off, he gives away silly free-kicks and gets himself suspended.
Granit Xhaka has been shown two red cards since joining Arsenal
"Xhaka is a capable player and hopefully we see that in years to come, but so far he hasn’t lived up to expectation either. He’s caused them more harm than good this season.
"These Arsenal players just make bad decisions at the worst times, hence they’re miles off the best sides in Europe.
"The last 16 of the Champions League comes down to making good choices, your mentality and being streetwise. Arsenal aren’t any of these."