Unfortunately, that's all we've got time for with this one. Never fear though, plenty more World Cup coverage to come today. I'll point you in the direction of Germany vs Mexico, which you can follow here.
In an open game that saw chances for each side, Kolarov's deadly accurate free-kick separated the two teams.
That's it, three points for Serbia which places them well to challenge Switzerland for progression alongside Brazil in Group E.
Full-time! Costa Rica 0-1 Serbia
90+3: This is the World Cup drama the neutrals might have been after as Nemanja Matic wrestles a member of the Costa Rica coaching staff to try and get the ball back, with Serbia in a good position to counter. VAR has a look for a possible red card offence, nothing doing.
90: No Costa Rica comeback here for me, Jeff. Kostic goes close with a powerful effort for Serbia. Five added minutes.
87: Penalty shout for Serbia, turned down by the referee. No VAR by the looks of things, it was Mitrovic in the area hauled down after being slid in by Milinkovic-Savic. Looked like a penalty to me...
85: Five minutes left, any chance of some late drama?
76: Ooooh, almost 2-0. Tadic pulls away on the right side of the area, his ball in heading towards Kostic who can't quite sort his feet out to convert.
72: It's a half-chance for that man Campbell as he turns well to get away beyond the defence, Milenkovic recovering well to nudge the ball out for a corner.
67: Joel Campbell comes on for Costa Rica, can he be the spark to get them on level terms?
65: Serbia in the ascendency now as Mitrovic heads wide, they're looking far more comfortable both on and off the ball than earlier on. Something needs to change for the trailing Costa Rica.
57: BANG! That's how you do it. Mitrovic hauled down on the counter down the right, Kolarov steps up and whips a powerful curled free-kick over the wall and into the top corner. No chance for Navas, a big chance now for Serbia to take all three points!
GOAL! Kolarov puts Serbia ahead with a wonderful free-kick!
55: Another chance for Mitrovic goes begging as he heads wide from a corner. He's appealing for a foul saying he was being held, but part of me thinks that's an excuse for what was a poor header.
50: Save! Keylor Navas on form again as Milinkovic-Savic sets Mitrovic away, the striker looks to go for the bottom corner but his effort is brilliantly kept out by Navas.
45: Back underway in this Group E opener.
Not a terrible first half by any means, but you do get the feeling a goal might liven up the game a little more.
Half-time: Costa Rica 0-0 Serbia
42: Calvo looking to make things happen for Costa Rica, cutting in from the left before sending a low effort back across goal and narrowly wide.
41: Just a few minutes until half-time and the game has slowed a little since that fast start. Will we see a goal before the interval?
36: Keylor Navas has had an impressive first half, punching away a dangerous Kolarov corner there. You have to wonder if he's putting himself in the shop window a little, given Real Madrid's reported interest in Roma 'keeper Alisson.
27: All eyes on Milinkovic-Savic as he gets on the end of a lovely ball over the top and sends a soft effort into the hands of Navas. The flag goes up regardless, sparing his blushes.
16: It's a real end-to-end game this, a lovely start for all. Ivanovic does well down the right and gets a low ball across the box, Keylor Navas swiping it away before Mitrovic could tap in.
12: Chance! The Serbian marking is all over the place, Costa Rican's queueing up at the back-post to score from a cross, Gonzalez somehow heading over when he really should score.
7: Kolarov does that thing he does whereby he'll hammer a shot wide and play it off as an attempted cross that nobody *quite* got on to.
3: And now Costa Rica attack! Good start, here. Serbia don't clear a corner properly and the ball goes back into the area, Gonzalez heading straight at Stojokovic.
1: Serbia threaten early from a corner, Llajic swings one in towards Mitrovic whose downwards header almost reaches Matic at the back-post before being cleared away.
0: Underway!
Serbia XI: Stojokovic; Kolarov, Milenkovic, Tosic, Ivanovic; Matic, Milvojevic; Llajic, Tadic, Milinkovic-Savic; Mitrovic.
Costa Rica XI: Navas; Duarte, Gonzalez, Acosta; Gamboa, Guzman, Borges, Calvo; Venegas, Ruiz, Urena.
Not long until kick-off now!
Team news will come an hour before kick-off but in the meantime, if you want to join in with the World Cup debate over on Twitter, make sure you follow us @VAVEL.
Newcastle United's Aleksandar Mitrović spearheads the Serbian attack and he will be hoping to show the same form in front of goal which he did for Fulham in his half a season loan spell at the Cottagers.
Real Madrid's Keylor Navas was a key factor for Los Ticos' excellent 2014 World Cup adventure and will have replicate the form he showed which earned him a move to the Spanish giants should his side hope to reach the final eight again.
Slavoljub Muslin was sacked following strong disapproval to his style of play - despite having earned the nation qualification to the World Cup. Mladen Krstajić, former Serbian defender will manage the side in Russia.
Both sides have just about full strength squads to choose from. However, Costa Rica defender Ronald Matarrita will miss the whole tournament through injury. Serbia enters the World Cup with a different manager to which guided them through the qualification process.
Costa Rica excelled in Brazil four years ago having reached the quarter-finals. It came to the surprise of the world as captain Bryan Ruiz guided his side to the last eight of the competition before being knocked out by the Netherlands on penalties.
Costa Rica vs Serbia Live
As for Serbia, Group E is expected to be topped by Brazil but second place is certainly up for grabs. With Switzerland their main rivals for the second spot, the Serbian side will be looking to start their campaign with maximum points.
The two sides will get Group E's World Cup underway in the city of Samara. Having lost their two warm-up friendly games against England and Belguim, Costa Rica will be hoping to shake off any cobwebs going into the tournament.
Hello and welcome to VAVEL UK's live text coverage of this afternoon's World Cup action from the Samara Arena as Costa Rica play Serbia.