Riether delighted with first season at Fulham
The fullback is in talks about a permanent move from Cologne.
"You never know what will happen in a new league, it was not easy coming to another country with a different style of football, but it has gone well for me," he said.
"German football and English football are different, so I had to adapt to a new style of play and new team-mates. Little by little it has got better and I hope that continues.
"Football in Germany is always physical and people like to see that in England - the fans like me and my style because I always give 100%."