Question: Who directed the sports film that starred the 1930-1932 heavy weight champion of the world?

Context paragraphs:
Michelle Thompson: Michelle Thompson was a member of the US national taekwondo team.  She was the 1993 and 1994 NCTA bantam weight champion.  She represented the U.S. at the 1995 world championships in the Philippines taking silver.

Catherine Phiri: Catherine Phiri is a Zambian boxer.  She won the title of the World Boxing Council bantam weight champion by defeating the Mexican boxer Yazmin Rivas on 30 January 2016 in Mexico.

Love in the Ring: Love in the Ring (German:Liebe im Ring) is a 1930 German sports film directed by Reinhold Schünzel and starring Max Schmeling, Renate Müller and Olga Tschechowa.  Schmeling was a leading German boxer of the 1930s, and the film attempted to capitalise on this.  Schmeling later appeared in another boxing-themed film in "Knockout" (1935).

Boxing in the 1930s: Boxing in the 1930s was affected by one of the biggest economic struggles in the history of the United States: the depression era.  Because of the suffering American economy, many boxers were offered lower amounts of money causing them to not box with passion.  When the decade began, there was no champion the world heavy weight title belonged to no one.  The sport boxing was boycotted for lack of money to output to the boxers.

Alexandre Ribeiro: Alexandre "Xande" Ribeiro (born January 20, 1981 in Manaus-Amazonas, Brazil), is a Brazilian Jiu-Jitsu practitioner, mixed martial artist and submission wrestler.  He is a two-time World (Mundial) Black Belt Absolute (open weight) World Jiu-Jitsu Champion, five-time World (Mundial) Black Belt Heavy Weight Champion, and three-time World Black Belt Pro Division Champion.

Jacob Martins Obiorah: Jacob Martins Obiorah is a Nigerian competitive martial artist who competed in national and international events in taekwondo.  He achieved Silver at the 8th All Africa Games, and competed in the Athens 2004 Olympic Games, and Taekwondo World Championships in 2005.  He won Gold medal and best player trophies at both the Belgian and Austrian Opens in 2005 (European Taekwondo Union- class A Tournaments).  Martins was also the British National middle weight champion 2005 (undefeated) and British University Welter weight Champion (BUSA 2005) representing London South Bank University.

Saint-Chamond (tank): The Saint-Chamond, named after the commune of Saint-Chamond, was the second French heavy tank of the First World War, with 400 manufactured from April 1917 to July 1918.  Although not a tank by the present-day definition, it is generally accepted and described as such in accounts of early tank development.  Born of the commercial rivalry existing with the makers of the Schneider CA1 tank, the Saint-Chamond was an underpowered and fundamentally inadequate design.  Its principal weakness was the Holt "caterpillar" tracks.  They were much too short in relation to the vehicle's length and heavy weight (23 tons).  Later models attempted to rectify some of the tank's original flaws by installing wider and stronger track shoes, thicker frontal armour and the more effective 75mm Mle 1897 field gun.  Altogether 400 Saint-Chamond tanks were built including 48 unarmed caisson tanks.  The Saint-Chamond tanks remained engaged in various actions until October 1918, belatedly becoming more effective since combat had moved out of the trenches and onto open ground.  Eventually the Saint-Chamond tanks were scheduled to be entirely replaced by imported British heavy tanks.

Max Schmeling: Maximillian Adolph Otto Siegfried "Max" Schmeling (] ; 28 September 1905 – 2 February 2005) was a German boxer who was heavyweight champion of the world between 1930 and 1932.  His two fights with Joe Louis in 1936 and 1938 were worldwide cultural events because of their national associations.

Spring Air Company: Spring Air Company is a mattress company based in the United States.  It was founded in Chicago in 1926 when Francis Karr patented a mattress design with free-end coils.  Because of the heavy weight, high transportation costs, and low value per unit weight of mattresses, they are often manufactured locally.  The company is thus a licensing organization, with local licensees manufacturing the mattresses under a common name for national marketing.  Like a cooperative, the licensees own the Spring Air name.  Spring Air has factories across the world.

Carson Jones: Carson Jones (born August 19, 1986 in Oklahoma City, Oklahoma) is an American professional boxer at welterweight and is the reigning USBA welterweight champion (June 11, 2011).  He was also the former NABA light-middle weight champion (April 22, 2010), the former WBC Continental Americas light-middle weight champion (May 7, 2009), and the former NABA USA light middleweight champion (April 18, 2008).  Nicknamed 'Mr. Jones', he achieved his highest ranking in May 2012, when he was placed as the #4 rated welterweight in the world by the IBF.

Supporting paragraphs: Love in the Ring Max Schmeling
Answer: Reinhold Schünzel