Hertha Berlin goalkeeper Rune Jarstein is set to make his comeback after 468 days out. Coach Sandro Schwarz announced on Friday that Norway’s Jarstein and new number one Oliver Christensen will each be used for a half on Saturday in a friendly against fourth-tier Babelsberg. The 37-year-old keeper first suffered a severe coronavirus infection, leading to heart muscle inflammation, before a knee injury that required surgery. Jarstein has been at Hertha for eight years but Dane Christensen, 23, looks set to start the season despite just two official appearances for the Berliners in the relegatio…