"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."
Brazil's Santos also moved within sight of a berth in the next round with a 2-1 win over 10-man Delfin in the Ecuadorian port city of Manta.
The following fixtures are scheduled for Saturday: Borussia Monchengladbach host Union Berlin, Bayer Leverkusen face Leipzig, Mainz meet newly-promoted Stuttgart, Augsburg clash with Borussia Dortmund, newly-promoted Arminia Bielefeld take on Cologne, and Schalke face Werder Bremen. Enditem
Messi's criticism comes just two days before Barca kick off their La Liga campaign with a home game against Villarreal on Sunday night and will not help his relationship with new coach Ronald Koeman, who was the person who called Suarez to tell him he was no longer needed. Enditem
There have been several instances of players challenging a Bundesliga club in such a manner in recent years. Ousmane Dembele and Pierre-Emerick Aubameyang both went on strike to force Borussia Dortmund to allow their transfers to Barcelona and Arsenal respectively.
Viera bagged his second with a stunning free kick in the 56th minute, before Cedric Bakambu added the fifth in the 85th minute.
Opponent Real Betis has started the campaign well under Manuel Pellegrini and the former Real Madrid coach looks to have added steel to a side which flattered to deceive last season.
Bach is also optimistic that vaccines could be available in the first half of 2021 after consulting medical experts from the World Health Organization.
The winner of this tie will then play away from home against the winner of the game between Swedish team Malmo and the Croatian side Lokomotiva Zagreb. Enditem
The growing number of fans returning their tickets is an ominous sign for both sides.
Last weekend's home defeat to Crystal Palace was a shock to Manchester United fans, immediately prompting fears that last season's progress could be lost after a frustrating summer in the transfer market.