Kronk won seven doubles titles during his professional career. The right-hander reached his highest singles ATP-ranking on 25 April 1976, when he ranked number 78 in the world.
Kronk won seven doubles titles. He was a runner-up in the US Open Doubles and a two-time runner up in the Australian Doubles, on all occasions partnering compatriot Cliff Letcher.
Round 1
Paul C. Kronk 1 *
Alvaro Betancur
7-6
6-1
Round 2
Paul C. Kronk 1 *
Andrew J. Pattison
7-5
6-4
Round 3
Paul C. Kronk 1 *
Heinz Gunthardt
6-2
6-1
Quarterfinals
Paul C. Kronk 1 *
Trey H. Waltke
2-6
6-3
6-3
Semifinals
Ivan Lendl 1 *
Paul C. Kronk
6-2
6-2
Round 1
Paul C. Kronk 1 *
Joel M. Bailey
6-3
6-4
Round 2
Paul C. Kronk 1 *
Joao Soares
7-5
6-1
Round 3
Paul C. Kronk 1 *
Marcos Hocevar
6-1
6-3
Quarterfinals
Paul C. Kronk 1 *
Tom Gorman
7-6
1-6
6-1
Semifinals
Alexander (Sandy) Mayer 1 *
Paul C. Kronk
6-3
3-6
13-11
Round 1
Paul C. Kronk 1 *
John L. Mulvey
6-0
6-2
Round 2
Paul C. Kronk 1 *
Brian Lawlor
6-1
6-2
Quarterfinals
Paul C. Kronk 1 *
Jeff Lee
6-1
6-1
Semifinals
Paul C. Kronk 1 *
Robert (Robbie) Booth
6-3
6-2
Final
Paul C. Kronk 1 *
Sean Sorensen
7-6
6-4
Round 1
Paul C. Kronk 1 *
Chris P. Kachel
6-3
6-1
Round 2
Paul C. Kronk 1 *
Andrew M. Jarrett
6-7
6-0
6-1
Round 3
Paul C. Kronk 1 *
Billy Martin
w.o.
Quarterfinals
Paul C. Kronk 1 *
Mark Farrell
7-5
6-3
Semifinals
Paul C. Kronk 1 *
Heinz Gunthardt
6-3
6-2
Final
Paul C. Kronk 1 *
Mark Edmondson
6-7
6-2
6-4
Round 1
Paul C. Kronk 1 *
Luis Baraldi
6-3
4-6
6-1
Round 2
Paul C. Kronk 1 *
Daniel Contet
6-2
6-0
Quarterfinals
Paul C. Kronk 1 *
Eduardo A. Zuleta
6-3
6-4
Semifinals
Paul C. Kronk 1 *
Michel Leclercq
6-0
4-6
6-2
Final
Victor Pecci 1 *
Paul C. Kronk
6-4
5-7
6-2