Viera bagged his second with a stunning free kick in the 56th minute, before Cedric Bakambu added the fifth in the 85th minute.
Leeds began their Premier League campaign with a 4-3 defeat away to Liverpool. Last weekend, the team coached by Marcelo Bielsa beat Fulham 4-3.
The world 10,000m bronze medalist Agnes Tirop of Kenya will also spice up the 3,000m event.
For over an hour, Sevilla managed to close the gaps in midfield and slow down Bayern's two-man driving force of Joshua Kimmich and Leon Goretzka.
Cadiz entertain Sevilla in another rescheduled game that has taken 24 hours off Sevilla's recovery time from the European Supercup final in Budapest. Valladolid face Celta, who will hope that striker Iago Aspas continues the form he showed as they beat Valencia a week ago. Enditem
Hertha responded well but both Dodi Lukebakio and Matheus Cunha squandered promising opportunities.
Beer Sheva now face Czech side Viktoria Plzen in a single-leg match to be played in Israel on October 1, with the winners entering the competition's group stage. Enditem
"You just learn how to deal with the situations that you're in. Obviously I've been in immense pressure situations. I've had people on the pitch whistling in the stadium to me."
Monday's first game saw Aston Villa beat Sheffield United 1-0 in Villa Park on a 63rd minute goal by Ezri Konsa Ngoyo.
Betis are another team with two wins from two games after Nabil Fekir's penalty after 10 minutes and William Caravalho's powerful drive from outside the area eight minutes later gave the team from Seville a comfortable 2-0 victory against Valladolid and maintain new coach Manuel Pellegrini's perfect start.
MADRID, Sept. 25 (Xinhua) -- FC Barcelona striker Leo Messi on Friday launched a stinging criticism of the club's Board of Directors for their treatment of Luis Suarez.