Everton and Nottingham Forest were targeting Doan this month, says BILD.
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However, the 27 year-old chose SGE as he left SC Freiburg this month.
Doan gave Eintracht Frankfurt his 100 percent commitment at the beginning of July – after a final period of reflection with his family in Japan.
The prospect of SGE's Champions League campaign has proved a key factor in Doan's thinking.
