By ESPNSTAR.com staff
With both teams level on points at the top of Group F, a victory in their upcoming clash will see either Bayern Munich or Valencia secure qualification to the next round.
Although the Bavarians start the fixture as favourites, Heynckes told uefa.com that his team will not have it easy due to the quality of Los Che's offense.
"A win will put us through to the next round, but it will not be easy," Heynckes said.
"Valencia have great offensive players. Roberto Soldado is a brilliant player who I know very well, but they also have players like Jonas and Nelson Valdez. We are very strong defensively, but we have to be very careful."
The match will also mark the return of Javi Martinez to Spain since his move to Bayern in the summer. Although critics have questioned the club's decision to shell out 40 million Euros for the midfielder, Heynckes believes Martinez will prove his worth in due time.
"We are very happy with Javi, we have to forget how much he cost and continue the integration process so he can play at the highest European level," he explained.
"His team-mates speak very highly of him, and the captain has acknowledged that it is the type of player that the team needed."
Bayern Munich travel to the Mestalla for their Champions League Group F fixture on Tuesday.