Arsenal's local rivals Chelsea had also inquired about the availability of Hartman over the January transfer window as they looked to plug defensive gaps left in Mauricio Pochettino's squad. However, Hartman revealed earlier this month, that he had rejected the move to Stamford Bridge.
He said to ESPN [via The Metro]: "I think they don’t want me now, but they really wanted me, yeah.
"It already started in the winter break. They came to Feyenoord, but at that moment I didn’t really want it myself. I had just broken through, just started playing everything and made it to the Dutch national team. The European Championship was coming.
"From Feyenoord, it was also clear: in the summer we are open to it, but not now.
"The last few months they came back and really wanted me. Unfortunately, things turned out differently. Now I’m staying with Feyenoord, but there’s a good chance it would have happened otherwise."