We take a look at some of the options that were also available to Arsene Wenger in January as midfield cover.
The Sweden international has been brought in as injury cover in the Arsenal middle - and for many a fan, it was not an impressive deal.
But Wenger seemed to think the club needed an injection - and a cost effective one - so it is a deal that has some credence on paper.
However, could they have done better?
We look at five midfielders who were on the move this winter that Arsenal could have snapped up for next to nothing.
Manchester City finally gave up on keeping the talented Norwegian Ibrahim this month - allowing him to join Olympiakos on a free transfer.
Arsenal have previously been linked with the player and after he led Stromsgodset to Norwegian glory last season he was in many teams cross-hairs.
An unproven quantity - but he could have been one for the future.
West Ham snapped him up this window - and Arsenal fans will know all about his quality.
He has shone in previous meetings between AC Milan and the Gunners in Europe and would have made an experienced and higher quality option than Kallstrom.
He left for Besiktas for less than half a million pounds as his deal at Schalke 04 was drawing toward its end.
Probably on a par ability wise with Kallstrom - the former Blackburn Rovers man could have been playing Premier League football again this season.
The former Liverpool man joined Levante for free - a few years after being bought by Juventus for the princely sum of £11 million in another January transfer window.
He would have provided a stop-gap option, perhaps on just a six-month spell and has Premier League experience.
No doubt that this was their best option.
The Mali international was a central cog in the great Pep Guardiola era Barcelona team - and he joined Valencia for six months from Chinese side Dalian Aerbin on deadline day.
Worst thing about it is - he cost absolutely nothing.
Would have been an excellent player to bring in as cover.
image: © goatling