Real Madrid coach Zinedine Zidane says he expects his team to "suffer" during Tuesday's Champions League last-16 second leg at Paris Saint Germain, but if they play as they can then they will qualify for the next round.

Madrid travel with a 3-1 advantage from last month's first leg at the Bernabeu, and also with key midfielders Luka Modric and Toni Kroos apparently recovered from recent hamstring and knee problems.

The Qatari-backed Ligue 1 champions have however scored at least three times in each of their last four home games in the competition [against Barcelona, Bayern Munich, Anderlecht and Celtic]. And the Los Blancos coach told his postmatch news conference that he expected his team to have rough periods in the game but to show their quality and progress.

"Starting with the scoreboard in your favour does not mean anything," Zidane said. "You must be ready for the unexpected, in your favour or against. The only thing we must do is play a great game ourselves. We must just focus on that. We will have to suffer, suffer and play our football."

Real Madrid should expect some hardship at PSG on Tuesday, says Zinedine Zidane. GABRIEL BOUYS/AFP/Getty Images

Asked whether he would prefer to have regular starters Kroos or Modric at 70 percent, or a back-up player at 100 percent, Zidane claimed that the pair were fully fit without giving away who would start.

"We must all be at 100 percent, I would never put in a player at 70 percent," he said. "Everyone who is here is ready to play.

"I am two years in the job and every day it is more difficult to choose the team. They all want to play. It is part of my job. And tomorrow I will do the same. I will not tell you now though who will play."

Since the first leg, PSG have regularly spoken of how heated the atmosphere is likely to get at the Parc des Princes, with the club's ultras invited to give a "warm welcome" to the visitors, and sporting director Antero Henrique calling for an "exceptional level" referee.

Zidane said his super experienced side, winners of the competition in three of the past four seasons, were unlikely to be distracted by such tactics.

"We are used to this," he said. "We have to just think about the game, that we will play 11 against 11, with a referee who will do his job. The atmosphere in the stadium will be very heated, it always is against Madrid. But the pitch is the pitch."

The former galactico said he did not expect the injury absence of Neymar to make a big difference to PSG, as his likely replacement, Angel Di Maria, would be extra motivated playing against his former club.

"It does not change anything, but it also changes everything, as they are different players," Zidane said. "[Di Maria] will be extra-motivated and will want to play a great game. We will be up against a competitive opponent."