Sweden's World Cup clash with Germany in Sochi on Saturday will carry extra sporting spice for their defender Martin Olsson because his sister is married to top German basketball player Dirk Nowitzki.
"He's a big football fan, so there's a lot of football talk in the family," Olsson told Reuters.
"We have a family chat on WhatsApp so there's been a good bit of banter... He probably wants Germany to win but it hasn't got serious yet, before the game starts it probably will," he said with a smile.
The 30-year-old was an unused substitute when Sweden beat South Korea 1-0 in their opening match but he has faced Germany before.
"The last two games against Germany when I've been involved, we had a 4-4 game in Berlin (in 2012) and a 5-3 game at home (in 2013) where we took the lead as well (before losing), so there's been a lot of goals from both sides," he said.
Germany have already been on the wrong end of a shock result, losing 1-0 to Mexico in their Group F opener, and they will be looking to get their campaign back on track against the Swedes.
He is aware of speculation linking him with a move away from his club Swansea City, who have just been relegated from England's Premier League, but said it would not affect his focus.
"The World Cup is always a shop window, but I haven't been thinking of it in that way," he said. "I have another year on my contract with Swansea and I have to respect that. I want to enjoy the World Cup, it's a dream to play for your country."
Olsson said he did not know if Nowitzki, who won the NBA Finals with the Dallas Mavericks in 2011, would be in the stands when the two sides meet in Sochi.
"We thought about having the family coming and watch the games, but we'll see," Olsson said.
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