The 31-year-old looks destined for his last World Cup outing with his Albiceleste side on the brink of an early exit from the tournament, except they fight hard and subdue the three-time African champions.
However, the German insists his side are poised to get their first World Cup win over the South Americans giants.
“We love this great player Messi, everybody loves him,” Rohr told media at the press conference in Saint Petersburg on Monday.
“But the question for us is not if it’s the last World Cup for him. We are not here to watch him play. We’re here to get a result.
“We are professionals and we have to defend the colours of Nigeria. In football, there is no mercy, no pity. Everybody wants to win.”