Real Madrid's final Champions League rehearsal was running perfectly on Saturday until Cristiano Ronaldo was substituted and Villarreal scored twice to snatch a 2-2 draw.
Portugal will face Spain, Morocco and Iran in Group B, and will play warm-up matches against Tunisia, Belgium and Algeria.
Gareth Bale pushed his case for a starting spot in the Champions League final vs Liverpool in Kiev in two weeks' time with two first-half strikes.
Cristiano Ronaldo appeared to sustain a knock to his ankle as he bundled home a 14th-minute equaliser for Real Madrid vs Barcelona.
Cristiano Ronaldo was forced off at half-time after appearing to hurt his ankle and Real Madrid will be hoping their star striker can recover in time for the Champions League final against Liverpool.
Real Madrid stand on the brink of a trio of finals ahead of their second leg against Bayern Munich in the Champions League last four on Tuesday.
Isco scored one and set up another a comfortable victory against Malaga for a much-changed Real Madrid side.
Gianluigi Buffon's Champions League career looks likely to end in a red mist of rage after Cristiano Ronaldo's late penalty rescued Real Madrid from a pulsating Juventus comeback.
The Portuguese superstar surpassed himself with a breathtaking overhead hit from inside the box to help put holders Real Madrid closer to the semi-finals.
Cristiano Ronaldo's two-goal salvo took his Portugal goal tally to 81.
Ronaldo has scored 79 goals in 147 games for Portugal and will lead the reigning European Champions to the 2018 World Cup
Flyod Mayweather made a bizarre claim that he could buy Newcastle United and persuade "buddy" Cristiano Ronaldo to join the Premier League club.
Real Madrid move four points behind second-placed Atletico Madrid, who will restore that gap to seven with a win over Celta Vigo on Sunday.
Ronaldo had scored twice -- including his 100th goal for Real in the competition -- as they won 3-1 in the first leg in Spain last month, and his header early in the second half at the Parc des Princes effectively ended the French club's hopes of progressing.
Angel Di Maria, a Champions League winner with Madrid in 2014, is set to replace Neymar in the home line-up before a sell-out crowd of around 47,000 at the Parc des Princes.
Cristiano Ronaldo was rested and the supporting cast failed to show up as Real Madrid endured a shock 1-0 defeat away to Espanyol on Tuesday.
Zinedine Zidane sought to quash media speculation about his future by stating emphatically that he wants to remain with the club.
Ronaldo scored his 100th Champions League goal for title-holders Real from the penalty spot late in the first half to cancel out Adrien Rabiot's opener for the French side at the Santiago Bernabeu, set up by Neymar.