Just using this illustration to clarify our defensive strategy.
It's a compact core with a defensively solid RB, a LCB with top notch reading of the game, a RCB who matches up well against Erico stylistically and Zito who is brilliant at commanding and guarding the danger area ahead of the defense in which Pedernera-Zizinho operate.
Re Veron : It's not like we are asking Veron to tail Pedernera/Zizinho or be a midfield heavyweight in the engine room. His task is relatively simple, playmake and provide service for the forwards on the ball. Off the ball he will be asked to put a shift in and make his presence felt. Nothing out of ordinary and as Enigma pointed out earlier, he's gone up against some of the best midfields of his era in the Serie A and shone.
His battle against Edgar Davids is definitely worth a watch in this one and he is certainly an useful player to have off the ball.
A few other masterclasses to refresh people's memory of Veron's time in Italy. Just watch the game against Milan if nothing else
Couple of points
1) Gio's attack is fairly narrow-ish and it's a centrally oriented attack, no two ways about it, and in both Gambetta and Leandro we have two wing-backs from Gio's side who have been instructed to attack. Now they are already facing uphill tasks with Gambetta against Garrincha, and Leandro against Sosa & a liberated Branco*. Asking them to play as attacking wing-backs without much cover is only going to exacerbate this issue. Arguably two of the best routes to goal on the entire pitch. Pizarro has been given the duty of covering for Gambetta but to what extent can he desert midfield duties and cover for the Uruguayan with Veron and Kempes in the centre? Even then to what extent will Pizarro's cover aid in helping out Gambetta against Garrincha. Let's not forget that we are talking about Garrincha here, one of the greatest dribblers and arguably the best winger ever (alongside Best). Someone who revelled in taking on not just his marker, but 2-3 players at once, and getting the better of them. That's not to paint him as unstoppable but it's going to take more than Gambetta (who is not in his specialist position and is playing as a wing-back) and some cover from the LDM (who is involved in a tough tussle in the middle) to stop him.
2) The threat of Branco
Leandro was already facing an tough battle against Ruben Sosa but that, coupled with Branco having the full freedom to bomb forward is only going to make things a whole lot more difficult for him. Branco was one of the best attacking full-backs of his era and he was the FB for the Selecao in their victorious 1989 Copa America and the 1994 World Cup campaigns.
Scoring a winner in the WC 1994 quarter finals against the Dutch en route to winning it. Has a decent goalscoring record for a FB for what it's worth - 11 goals in 97 appearances in the Italian Serie A and 9 goals from 72 international caps.
Whilst it's fairly tight in the middle, it's the flanks which separate both teams imo.
Now Gio's instructions are to let
Zizinho will keep an eye on Branco advancing but should be well placed to get the better of him going forward.
I'm happy to be corrected here but Zizinho going up against Branco doesn't really sound like his game, nor does tracking back a wing-back appear to be up his alley. He was definitely a hard working player and I can see him pressing the likes of Godin, Zito etc and making his presence felt in the inside right channels/middle (ala Pedernera, Kempes etc) but asking him to 'keep an eye on Branco advancing' does seem like a tactical misfit. Like I stated I'm happy to stand corrected if he did a job on the right wing and was 'working the flanks'. From what I know about him, he is an exceptionally talented inside right who was predominantly a central player but someone with right flank tendencies - naturally as most of the 'inside forwards' from that era had to establish a partnership with their 'outside left/rights'. However, asking him to operate like an outside right, as per Gio's instructions in the OP, might not be the ideal use of him.