Freiburg may have to again do without striker Nils Petersen at Hoffenheim on Saturday as the Bundesliga side push for a top-four finish. After missing the 3-3 draw against Borussia Mönchengladbach last weekend due to illness, the striker returned to the training ground on Thursday. But coach Christian Streich left it open whether the 33-year-old will be involved for the away game at their south-west neighbours. “We don’t know yet whether it makes sense,” the coach told reporters. The same applies to defender Manuel Gulde, who was also ill. Kevin Schade is definitely out with an abdominal muscl…