Sack him. Sack him now.
Diego Maradona might be one of the three greatest footballers to have ever played the game, but he also happens to be one of the daftest managers to ever be put in charge of a major footballing nation. And right now, it's costing Argentina.
He can't get his team to defend set pieces (the first goal, in particular, was a bloody travesty). He is ill-prepared for things you can easily prepare for (a few months ago, the altitude in Bolivia gave his team enough problems for the score to finish 6-1). He has problems with his players (Riquelme, admittedly a headcase at the best of times, went off and retired from the national team to get away from Maradona). He has a mistake sense of nationalism (I don't even want to get into why he doesn't call up Higuain -- just google it). He has little idea of substitutions or tactical nous (putting in Milito for Tevez when the latter was doing an excellent job of harrying Brazil's ball control was quite stupid). He also has an extremely strange relationship with his team's (and the world's) best player. It's a little mentor-ish combined with a little bit of jealousy, in my view. His compliments to Leo are always backhanded, and you always get the impression that he wants to remind Messi (and everyone else) that he's not as good as Maradona himself was. At the minimum, it's not a typical relationship between a manager and his best player, one who happens to be a great team man.
In short, Diego Maradona is a bad manager. And if he continues to be Argentina's manager, they could well miss out on next year's World Cup.
This is how the South America qualifying table looks right now (via Soccernet). The top four teams are guaranteed a spot. The fifth will play a qualifying playoff against the fourth place team from the CONCACAF group (currently Mexico).
Argentina have three games left: Paraguay away, Peru at home, Uruguay away. Of course, we have no idea how the remaining games will play out for the other teams, so it's pointless going through the various permutations here. But my best guess is Argentina will need six points to get the fourth spot. Anything less, and any of Colombia, Ecuador, Uruguay or Venezuela (currently 2-1 up on Chile as we speak; if that result holds they join two other teams on 20 points) can catch them. Hell, you can imagine 5 or fewer points condemning Argentina to sixth place, which means automatic disqualification.
The basic point is: this is do or die time for Argentina. They don't have the best team in the world by any stretch (their defenders not named Zanetti aren't exactly the best), and their playmaking options aren't setting the world alight either (the aforementioned Riquelme or the ancient Veron; for some reason Lucho Gonzalez isn't in Maradona's plans), but they do, on paper, have a top five or six team. But they will never play to their potential with this coke-head as coach. Can you imagine...I mean can you IMAGINE a World Cup without Argentina?
As for the game itself, well, not much to say really. Dunga has made Brazil look like Mourinho's Chelsea (substitute Fabiano for Drogba), what with the unimaginative play, the reliance on set pieces, the cynical fouling and kicking of the opposition's best players, and the caging of free-spirited and talented players. Fair enough, but as with Mourinho, it's working. Brazil won their first game on Argentinan soil in something like thirty years. And they did it comfortably too. Argentina briefly threatened in the first twenty minutes of the second half, applied loads of pressure, played their hearts out, got within a goal from a flukish strike from distance from Datalo, but Kaka trod on their collective neck with a beautifully weighted through ball for Fabiano to delicately chip, and it was over. Honestly, Argentina didn't look even remotely in the same class as Brazil -- it was like a big brother toying with the kid brother, letting him have the ball for a bit before reminding him who's boss. They look scary good, and in a match-up with Spain (the equivalent of Barcelona on the international stage), I know who I'd be favoring (hint: it's the bad guys). Ugh.
Come on, Argentina. Sack Maradona while you still have a chance. Don't make me watch next year's World Cup without Lionel Messi. Please.