Kei returned to the Challenger tour later in April with great success, reaching quarterfinals at both Baton Rouge and Tallahassee events, followed by a victory at the Savannah Challenger over Ryan Sweeting in the final.
Kei kembali ke Challenger tour pada bulan April dengan sukses besar, mencapai babak perempat final di Baton Rouge dan Tallahassee, diikuti dengan kemenangan di Savannah Challenger atas Ryan Sweeting di final.