Rumours of the switch had gathered pace over the past month, but earlier in the year it had seemed as though a move to the Bundesliga or Premier League would be more likely for the German international.
The emergence of Francis Coquelin coupled with Khedira's battle with injury has tempered any disappointment at missing out on the World Cup winner, but there was real intrigue among fans as to what it could mean for another transfer target for the club.
Juventus midfielder Arturo Vidal has been linked with joining Arsenal this summer, with The Telegraph reporting that his agent, also Alexis Sanchez's, has held talks with the Gunner over a move for his client.
Khedira's arrival at Juventus means more competition for places in midfield, with the suggestion that this enhances Vidal's chances of moving on.
He is not the only candidate, with Paul Pogba, Andrea Pirlo and Claudio Marchisio all candidates to make way, but some supporters have got ahead of themselves and willingly convinced themselves the Chilean is Arsenal bound as a result of Khedira's decision to join the Champions League finalists.
Here is a look at the various reactions from Arsenal fans to Khedira moving to Juventus...
Khedira joins Juventus. Now i can say Arturo Vidal is gooner. #AFC— T (@Mohamed_tottie) June 9, 2015
Khedira confirmed to Juventus, surely opens up the door for Vidal to leave. #afc— Jarred (@jarred1886) June 9, 2015
We didn't need another Diaby in Khedira. That won't hurt. What will is if we lose out on Schneiderlin &/or Wanyama. #afc— Ice Man (@Freezer_L) June 9, 2015
Samy Khedira signs for Juventus. Great signing. Can't believe Wenger didn't go in harder for him. Would have been perfect for us. #AFC— Hakar Rashid (@hakar_r) June 9, 2015
Khedira has made his move to Juventus, Vidal looks all the more likely now. #AFC— Lars (@LarsYannick) June 9, 2015
Sami khedira to juventus?! Does that mean that Arturo Vidal is going to Arsenal? #afc— Yazid Bawa (@yazidbee) June 9, 2015