Ignacy Tłoczyński was born 14 July 1911, in Poznań, then part of the German Empire, and was considered a skilful young player practising at the local courts of the town.

According to the amateur rules that were in effect in pre-World War II tennis organisations, only professionals could financially benefit from playing.

These achievements led to him being put up for voting by the Przegląd Sportowy newspaper for the Polish Sportspersonality of the Year where he finished second, right behind track and field runner Janusz Kusociński.

[8] In 1933 he finally won the Nizza title both in singles and doubles, with his Davis Cup teammate Józef Hebda against Max Ellmer and Aeschlimann-Journu respectively.

[12] In March 1939 he won the doubles of the Monte-Carlo tournament with Józef Hebda, overcoming the Belgian duo of Pierre Geelhand de Merxem and Charles Naeyaert.

[14] In the 1946 Wimbledon Championships he represented his nation, although the Communist government of Poland protested against it because of his wartime affiliation with Anders and the partisans.

[15] In 1946 he won the singles title at the North of England Hard Court Championships on clay in Scarborough and retained it in 1947,[16] he would go on to win it three more times consecutivley between 1948 and 1950.

[18] In July 1950 rain prevented the doubles final to be played at the Midland Counties Championships in Birmingham where Tłoczyński and Czesław Spychała were about to be featured and the prize was shared with their opponents Jaroslav Drobný and Bill Sidwell.

[21] In October he was a finalist for the Covered Court Championships of the United Kingdom facing eventual victor Geoffrey Paish.

In 1952 he entered the Connaught Hard Court Championships tournament where he reached the doubles final together with Anthony John Mottram where they were stopped by Cawthorn-Tregonning.

[27] In the first days of the uprising along with his brother Ksawery and several prominent sportsmen including Czesław Spychała, Jerzy Gottschalk, Antoni Smordowski and Tadeusz Hanke he stormed an SS barrack and occupied it.

[28] The assault, which took place on 1 August 1944 saw a one and a half-hour struggle in which the partisans threw in grenades and petrol bombs and surrendered the Germans.

[28] He kept on serving as a corporal and mainly operated in the Śródmieście-Północ as a member of the battalion "Ruczaj" within the Wojskowa Służba Ochrony Powstania branch of the Sub-district I of Śródmieście.