Bayern beat Madrid 2-1 in the first leg of their Champions League semi-final tie at the Allianz Arena last week, and Sanchis feels the Bavarians' performance was typical for a side coached by Heynckes, after playing under the German during the 1997-98 campaign.
"There are certain coaches who rely on a strong defensive structure, and there are others who let their teams attack, utilising the qualities of their forwards. I think Heynckes is someone who creates a balance between defence and attack," Sanchis was quoted as saying by the official Uefa website.
"He manages to create very balanced teams and as a result his teams are strong. Heynckes puts a big emphasis on balancing defensive and attacking work on the training ground.
"He builds a solid team with an ability to close the game out, or open it up when necessary. When teams aren't balanced they fail to possess these qualities. He brought that quality to the '98 Madrid team and I noticed that the current Bayern side operate in a very similar way."
Bayern Munich defend their 2-1 lead from the first leg on Wednesday when they take on Madrid at the Santiago Bernabeu.
Starting last month and continuing for 10 weeks, Goal.com is publishing exclusive extracts from Luca Caioli's new book, Ronaldo: The Obsession for Perfection. The fifth extract, published on Friday, looks at the Portuguese's intense rivalry with Barcelona's Lionel Messi ahead of this weekend's Clasico clash. Don't miss it!