Amirkhani var kort forbundet med en kamp mod Diego Rivas den 20. juni 2015 på UFC Fight Night 69.<ref>{{Cite web|url=http://cagepages.com/2015/04/02/niklas-backstrom-vs-noad-lahat-makwan-amirkhani-vs-diego-rivas-added-to-ufc-fight-night-69-in-berlin/|title=Makwan Amirkhani vs. Diego Rivas added to UFC Fight Night 69 in Berlin|publisher=cagepages.com|last=Sean Bio|date=2015-04-02|access-date=2015-05-02}}</ref> Imidlertid blev, der kort efter kampen meddelt, at Rivas blev trukket fra kampen på grund af uafklarede årsager og erstattet af Masio Fullen.<ref>{{Cite web|url=http://www.mmaviking.com/makwan-amirkhani-versus-masio-fullenjoins-ufc-in-berlin|title=Makwan Amirkhani joins UFC in Berlin Card|publisher=mmaviking.com|last=Ryan O'Leary|date=2015-04-16|access-date=2015-05-02}}</ref> Amirkhani vandt kampen via submission ved rear naked choke i første omgang.<ref>{{Cite web|url=http://mmajunkie.com/2015/06/ufc-fight-night-69-results-makwan-amirkhani-swiftly-submits-masio-fullen|title=UFC Fight Night 69 results: Makwan Amirkhani swiftly submits Masio Fullen|publisher=mmajunkie.com|last=Ben Fowlkes|date=2015-06-20|access-date=2015-06-20}}</ref><ref>{{Cite web|url=http://mmajunkie.com/2015/06/emotional-makwan-amirkhani-plans-more-gifts-for-mom-says-his-work-in-life-is-done|title=Emotional Makwan Amirkhani plans more gifts for mom, says his work in life is done|publisher=mmajunkie.com|last=Mike Bohn|date=2015-06-20|access-date=2015-06-20}}</ref>
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