41' Lucas Martinez lofts it forward for the run of Ocampos, but Arriaga comes across to put it out of play for a throw.
39' With five minutes left in the first half, Ecuador will be happy to go into the interval down by a goal. They’ve been made to work very hard in the first half, with little offensive success to show for it.
37' An Argentina backpass into their own half is almost cut out by Valencia, who has since recovered from his earlier knock. Eagerness gets the better of the Ecuador forward, however, as he fouls Lucas Martinez in pursuit of the ball.
35' There hasn’t been less than two goals in this fixture since a 0-0 draw in a friendly match in 2013; a run of four matches.
32' Messi floats the set-piece into the penalty area, but two strong fists from Alexander Dominguez clears it away.
30' Tagliafico chips it into the penalty area looking for Ocampos, but it’s just too high for the forward. He manages to collect the ball and fizz it back into the six-yard box looking for Lautaro Martinez, but it’s quickly cleared for a corner.
28' This match is being played in an aggressive manner by the visitors, who are flying into every tackle in order to win the ball back. Montiel is the latest target, as he is pressured physically into putting the ball out for a throw.
26' The referee blows play to a halt as Valencia is down holding his side in some pain. He had gone into a 50-50 tackle with Otamendi minutes earlier, and perhaps is still feeling the effects.
23' Ecuador are enjoying a spell of possession in midfield, but Argentina are holding their shape well. There hasn’t been any incision from the visitors, who are forced to knock it around from left to right.
19' Messi drives through the heart of midfield, passing it off and receiving it back before attempting a left-footed curler. The defence is immediately on their toes though as four bodies converge to block the attempt.
17' Lucas Martinez plays a quick pass forward looking for the foot of Messi, but Gruezo cuts across and wins the ball back in the nick of time for Ecuador.
15' It’s been about as poor a start as possible for Ecuador, who have it all to do at the Bombonera after going a goal behind. They’ve shown little in the way of attack, with the forwards really struggling to get into the game.
11' PENALTY TO ARGENTINA! Ocampos drives into the penalty area and gets towards the byline, prompting a wild and rash tackle from Estupinan - who scythes down the forward without any chance at the ball. The Albiceleste are given the opportunity to go a goal up from the spot!
9' Ecuador’s first real attack of the game comes down the left, but Estipinan’s low cross is fired into nobody as Armani is able to comfortably step off his line and claim it.
7' Messi takes the corner short and attempts to fire it in from a different angle, but a foul in the penalty area allows Ecuador to clear from a free-kick.
5' An early ball played to Messi ends in a corner after his lay-off for Lautaro Martinez ends in a blocked shot.
3' Argentina will look to better their third-place result in CONMEBOL qualifying for the World Cup in 2018, when they finished behind Brazil and Uruguay.
1' Argentina get the match underway from the kick-off!
Dominguez starts in goal for Ecuador in Alfaro’s first XI in charge of Ecuador. The back four will consist of Ferigra, Arreaga, Arboleda and Esutpinan, while Renato Ibarra, Gruezo, Franco and Caicedo will play across the midfield. In attack, Mena plays alongside former West Ham and Everton striker Valencia.
Scaloni starts with the familiar Armani in goal, with Montiel and Tagliafico either side of centre-backs Lucas Martinez and Otamendi. De Paul, Paredes and Acuna form a midfield trio while Ocampos and captain Messi will look to supply lone striker Lautaro Martinez.
ECUADOR SUBS: Junior Sornoza, Angelo Preciado, Michael Estrada, Hernan Galindez, Pedro Ortiz, Gonzalo Plata, Leonardo Campana, Mario Pineida, Jose Cifuentes, Felix Torres, Romario Ibarra, Jhegson Mendez.
ECUADOR XI (4-4-2): Alexander Dominguez; Erick Ferigra, Xavier Arreaga, Robert Arboleda, Pervis Estupinan; Renato Ibarra, Carlos Gruezo, Alan Franco, Moises Caicedo; Enner Valencia, Angel Mena.
ARGENTINA SUBS: Juan Foyth, Alejandro Gomez, Carlos Correa, Esteban Andrada, Lucas Alario, Nehuen Perez, Guido Rodriguez, Nicolas Dominguez, Eduardo Salvio, Exequiel Palacios, Giovanni Simeone, Emiliano Martinez.
ARGENTINA XI (4-3-2-1): Franco Armani; Gonzalo Montiel, Lucas Martinez, Nicolas Otamendi, Nicolas Tagliafico; Rodrigo De Paul, Leandro Paredes, Marcos Acuna; Lionel Messi, Lucas Ocampos; Lautaro Martinez.
With 10 minutes remaining before kick-off, let's take a look at how the two sides will line up - starting with the hosts!
Argentine Gustavo Alfaro is tasked with defeating his home nation as coach of Ecuador’s national side in his first match overseeing La Tricolor. The side have won three of their last five matches - all friendlies; though one of those two defeats was a 6-1 drubbing to tonight’s opponents.
Lionel Scaloni and Argentina will look to get their quest for a place in the World Cup started on the right foot with a win in Buenos Aires - just under one year since they last took to the pitch; a 2-2 draw with Uruguay. Home form is exceptionally important in the marathon of CONMEBOL qualifying, so the Albiceleste will be under pressure to get a result right from the off.
Hello and welcome to our LIVE commentary of the CONMEBOL World Cup qualifier between Argentina and Ecuador!