[14] In November, Peliwo reached his first professional singles final at the ITF Futures in Mérida, but lost to fellow 18-year-old Lucas Pouille.

[15] In May, Peliwo reached his second doubles final but lost again, this time at the Futures in Heraklion to Joshua Milton and Andrew Whittington.

[19] At the Masters 1000 Rogers Cup, at the beginning of August, Peliwo was granted a wildcard into the main draw, his first appearance at an ATP Tour tournament.

[22] In late September, Peliwo won his first pro title at the Futures in Markham when compatriot Philip Bester gave him a walkover in the final.

[24] At the Grand Prix Hassan II in April, Peliwo successfully made it through three rounds of qualifying for the first time to get a spot in an ATP tournament main draw without the use of a wildcard.

[26] At the end of June, Peliwo reached his first singles final of the season at the Futures in Richmond where he was defeated by Dennis Novikov in three sets.

[29] In September, Peliwo reached the doubles final of the Futures in Markham where he was defeated by Matt Seeberger and Rudolf Siwy.

[30] In February 2015, Peliwo captured his second pro singles title at the Futures in Feucherolles with a straight sets victory over Antal van der Duim.

[31] Two weeks later, he won his first professional doubles title after defeating Hiroyasu Ehara and Takashi Saito with partner Pietro Licciardi in the final.

[34] Peliwo won his fourth singles title at the ITF Futures in Toronto in September 2016, defeating Rhyne Williams in straight sets.

[37] Two weeks later, he won his sixth ITF title with a victory over Issam Haitham Taweel again in Sharm El Sheikh.

[38] At the end of April, Peliwo won his third ITF singles title in four weeks with a straight sets victory over Moez Echargui at the Egypt F15 in Sharm El Sheikh.

[42] The next week, Peliwo captured his sixth ITF singles title of the year with a victory over Marcos Giron in Saskatoon and reached the doubles final again with Schneider.

[45] In March, Peliwo advanced to his first ATP Challenger doubles final in Drummondville, losing to Joris De Loore and Frederik Nielsen with partner Luis David Martínez.