This week, Roger Federer made an appearance at Dubai Duty Free Tennis Championships where he suffered a huge upset in the 2nd round against a seemingly unknown ATP player. Between this particular moment and the stunning result in Melbourne, at Aussie Open has been an ultra-optimistic bubble kept growing around Roger Federer and his further impact on the ATP circuit.

The Swiss will turn 36 next August and despite this fact, some still rely on him to have a solid voice in men's tennis. There is a small separating the enthusiasm from ignorance or inability to see the whole picture.

The outcome in Dubai mitigates the wave of enthusiasm

By winning the Australian Open for the 5th time, Roger Federer did cause highly-anticipated reactions from all over the world. But, for his fans, it was the perfect cure for those unsettling frustrations over the past couple of years. Back in 2015, as no one seemed able to do it, Federer prowled himself as the main opposition against Djokovic's authoritarian march. That brought up a huge disappointment when they met in Grand Slams final, at Wimbledon and later that year at US Open.

When it comes to the tennis court domination, on both occasions, Djokovic put himself above Federer's pace. The cherry on top of the cake came last year at the Australian Open when again Federer failed to do some serious damage in the semis against the Serb.

So, this year's phenomenal outcome with the Swiss winning his 18th Grand Slam titles, any regulatory measures to keep fans enthusiasm and expectations within the boundaries were simply cancelled.

The shadow of the injury scare

In the early days of February 2016, Federer was subject to a knee injury. What initially appeared to be a month or two spent outside the tennis court, almost forced him to hang his racket on the wall.

Despite all cautious measures, for a professional tennis player, the shadow of an unexpected injury will be always there. There is no safe passage to avoid it, it's just about a grain of luck and knowing when to push harder or not.

Recently, Federer signed a commitment stipulating that he will compete until 2019 in Basel, an ATP 500 event in his hometown in Switzerland. But, that's barely a pledge for his future on the ATP World Tour.