 In June 2019, he signed for second-tier Swiss club FC Lausanne-Sport, where he replaced the injured second goalkeeper Dany Da Silva

During his time at Paris Saint-Germain, Diaw became a trending topic on social media site Twitter after a string of obscene tweets posted by his account.Tweets included vulgar jokes and even posting the phone number of teammate Zlatan Ibrahimović.Club officials were quick to address the issue, claiming Diaw's account had been hacked.