Zdenek Zeman has lived the Rome derby from both sides and analyses Sunday's showdown, but is unimpressed with Luis Enrique and Edy Reja.
The current Pescara boss was in charge of Lazio from 1994 to '97, then Roma from 1997 to '99.
“Luis Enrique came to Italy trying to impose his possession football. Reja changes system too many times. Hernanes plays in the centre, then on the left, then who knows?
“Besides, he's not accustomed to challenging for the Scudetto, which says a lot about his career,” Zeman told the Corriere dello Sport.
“As a Coach, you have to relax the team ahead of a derby, as there is always too much pressure. It's almost better to watch the stands than the pitch, as that is where the real spectacle lies.
“I am not cheering on either side, I just hope the people enjoy themselves.”
Roma's chances have been hit by the news Francesco Totti won't recover in time from a thigh strain.
“In my view Totti can play in all midfield and attack positions. I think the centre-forward role was bad for him. He scored more, but picked up more injuries too. He's still the best player in Italy, though.
“As for Lazio, Hernanes doesn't have the pace to be on the wing, so I consider him a midfielder. If he's one of the best, then he has to prove it by taking the team in hand. I don't think he is great, but he has the quality to become great.”
Zeman cast his eye over the rest of Serie A and had praise for Walter Mazzarri.
“Napoli are the side I like the most, as in terms of philosophy they remind me of my Foggia and my Lazio. They have the right players for the counter-attack, like Ezequiel Lavezzi.
“Antonio Conte turned up at Juventus with the 4-2-4 and then started experimenting, so it'll take a little more time to find the right system. They're a work in progress.”