2. Serbia could surprise Brazil

Serbia dominated their match against Costa Rica but couldn't finish their chances. Aleksandar Kolarov saved the day with a pinpoint free-kick. 

Serie A star Sergej Milinkovic-Savic has put his name on the map with some blistering performances. Despite losing out to Switzerland in their second game, the Lazio midfielder, along with fellow 23-year old Aleksander Mitrovic, have proven they have the ability to win matches. 

Their match against Switzerland, however, showed a side of Serbia that could haunt their chances of progressing to the knockout stage.

Mitrovic sent them ahead in the fifth minute with an exquisite header and Serbia were on top for the first half but couldn't capitalise on their chances. It was a tale of two halves as Switzerland came out of the blocks, beating the Serbians to every loose ball and tackle. 

Granit Xhaka's thunderous strike levelled things and Serbia's mentality began to waver. In the 89th minute Xherdan Shaqiri stole the show and gave an insight into the mentality of the Serbian side.

SERBIA V SWITZERLAND - PLAYER RATINGS

Their match against Brazil isn't going to be a walk in the park but and their chances hinge on Nemanja Matic. 

If Matic has half the game he had against Costa Rica and controls proceedings for the Serbians, Mladen Krastjic's side may put an upset on the cards. 

3. Stuttering Brazil a disappointment

Tite's Brazil finished 10 points ahead of Uruguay in CONMEBOL qualification and were unbeaten in their pre-World Cup friendlies. It seemed as though it was finally time for redemption for the Selecao

Perhaps not. Against Switzerland, Brazil took the lead thanks to Phillipe Coutinho's brilliance from outside the box but Miranda's poor defending at the corner allowed Steven Zuber to equalise.

Despite numerous chances, Neymar and co. never found a way back. Come matchday two, we expected a few changes, but Tite made only one for the misfiring Brazilians and it was at right-back, with Fagner replacing Danilo.

WIth over 70% possession and 22 shots, Brazil couldn't find a way through until they made some proper attacking substitutions. Douglas Costa and Roberto Firmino made an impact as Brazil won by the skin of their teeth.

BRAZIL V COSTA RICA - PLAYER RATINGS

Brazil face a tough test against Serbia to qualify hoping to avoid embarrassment again at a World Cup.