The "Herthaner" should have restored their three-goal advantage in the 71st minute, but Cordoba failed to beat Pavlenka in a one-on-one.
The single-leg match was played behind closed doors at Sammy Ofer Stadium in the northern city of Haifa.
Granada dedicated the rest of the game to conserving energy ahead of their weekend La Liga game at home to Alaves, while the home side were reduced to 10 men in the 80th minute after Fabjan Beqja was sent off for two yellow cards.
"I didn't think I was totally ready for the event, but I was happy that I wasn't affected by others and finally made it," said the veteran Liu.
Angelo Preciado, Gabriel Torres, Jairo Sanchez, and Beder Caicedo piled further misery on their opponents with second-half goals.
Additionally, the FIFA Congress also approved amendments relating to players switching national teams. Enditem
The 79,000-seat Maracana, which hosted the World Cup deciders in 1950 and 2014, was this month described as having the worst playing surface in Brazil by Flamengo vice-president Marcos Braz.
Cologne came out highly motivated after half-time and dominated proceedings, but still the "Billy Goats" squandered a number of chances.
LONDON, Sept. 15 (Xinhua) -- Gabonese striker Pierre-Emerick Aubameyang has signed a new three-year contract with Arsenal, the English Premier League club confirmed on Tuesday.
MADRID, Sept. 16 (Xinhua) -- FC Barcelona coach Ronald Koeman has admitted he is pessimistic about the club's chances of strengthening its squad before starting the new season.
Hoffenheim dominated possession and produced more promising chances but Horn was on guard to deny Kramaric and Pavel Kaderabek in the 18th minute.