For Arsenal fans, it's hard to know what to feel when it comes to Alexis Sanchez.On the one hand, he's comfortably the club's best player and is one of their major hopes in breaking back into the top four this season, however slim those chances may ultimately be.On the other, he clearly doesn't want to be at the club and if he had gotten his way, he would have left for Manchester City in August and enjoyed a Pep Guardiola reunion.It's not like Sanchez can take his mind off things with the Chile national side either.Chile's 3-0 loss to Brazil on Tuesday night meant they failed to qualify for next summer's 2018 World Cup in Russia to the surprise of pretty much everybody.A Gabriel Jesus brace - perhaps a future City teammate in waiting -
and a tap-in from Barcelona man Paulinho meant Brazil finished top of the South American qualifying group with an impressive +30 goal difference.Chile still could have qualified despite the loss, but Peru's surprising draw with Colombia ensured La Roja's and Sanchez's absence from Russia next year.Ironically, it was Arsenal teammate David Ospina's mistake that gifted Peru their vital equaliser and it'll sure be interesting when Sanchez sees him for the first time at their London Colney training ground.In light of Sanchez's pending absence next summer, plenty of Arsenal fans have had the same school of thought on Twitter:

The former Barcelona man is out-of-contract at the end of the season and is almost certain to depart the Emirates Stadium.

Arsenal's inability to truly challenge for the title or make any real progress in Europe has left Sanchez frustrated and he seems destined to follow in the footsteps of Samir Nasri, Kolo Toure, Gael Clichy and Emmanuel Adebayor by departing north London for Man City.

Just when the Gunners thought they might get a fresh Sanchez ready for next season, he's going to head to one of their Premier League rivals. Does it get much worse?