Konstantin Efremov
| Nationality | Bulgarian |
International stats
| Season | Team | Competition | Apps | Subs | Goals | Y | R |
|---|---|---|---|---|---|---|---|
| 1929-30 | Bulgaria | International Friendly | 2 | ||||
| 1930-31 | Bulgaria | B International | 1 | ||||
| 1930-31 | Bulgaria | Balkan Cup | 5 | ||||
| 1931-32 | Bulgaria | B International | 1 | ||||
| 1931-32 | Bulgaria | Balkan Cup | 4 | ||||
| 1931-32 | Bulgaria | International Friendly | 1 | ||||
| 1932-33 | Bulgaria | Balkan Cup | 5 | ||||
| 1932-33 | Bulgaria | International Friendly | 2 | ||||
| 1933-34 | Bulgaria | FIFA World Cup | 3 | ||||
| 1933-34 | Bulgaria | International Friendly | 2 | ||||
| 1934-35 | Bulgaria | Balkan Cup | 3 |
Please note: Career stats are based on performances in the Premier and Football Leagues and (in most cases all) internationals.
International matches
| Date | Match | Result | Competition | Round | |
|---|---|---|---|---|---|
| 13 Apr 1930 | Yugoslavia v Bulgaria | L | 6-1 | International Friendly | |
| 15 Jun 1930 | Bulgaria v Yugoslavia | D | 2-2 | International Friendly | |
| 12 Oct 1930 | Bulgaria v Romania | W | 5-3 | BALKAN CUP | |
| 16 Nov 1930 | Bulgaria v Yugoslavia | L | 0-3 | BALKAN CUP | |
| 07 Dec 1930 | Greece v Bulgaria | L | 6-1 | BALKAN CUP | |
| 19 Apr 1931 | Yugoslavia v Bulgaria | L | 1-0 | BALKAN CUP | |
| 10 May 1931 | Romania v Bulgaria | L | 5-2 | BALKAN CUP | |
| 17 May 1931 | Bulgaria v Italy | D | 2-2 | B INTER | |
| 27 Sep 1931 | Bulgaria v Turkey | W | 5-1 | BALKAN CUP | |
| 04 Oct 1931 | Bulgaria v Yugoslavia | W | 3-2 | BALKAN CUP | |
| 25 Oct 1931 | Bulgaria v Greece | W | 2-1 | BALKAN CUP | |
| 20 Mar 1932 | Italy v Bulgaria | L | 4-0 | B INTER | |
| 27 Mar 1932 | Greece v Bulgaria | W | 1-2 | International Friendly | |
| 26 Jun 1932 | Bulgaria v Romania | W | 2-0 | BALKAN CUP | |
| 30 Jun 1932 | Yugoslavia v Bulgaria | W | 2-3 | BALKAN CUP | |
| 02 Jul 1932 | Bulgaria v Greece | W | 2-0 | BALKAN CUP | |
| 04 Nov 1932 | Turkey v Bulgaria | W | 2-3 | International Friendly | |
| 21 May 1933 | Spain v Bulgaria | L | 13-0 | International Friendly | |
| 04 Jun 1933 | Romania v Bulgaria | L | 7-0 | BALKAN CUP | |
| 07 Jun 1933 | Yugoslavia v Bulgaria | L | 4-0 | BALKAN CUP | |
| 10 Jun 1933 | Bulgaria v Greece | W | 2-0 | BALKAN CUP | |
| 18 Mar 1934 | Bulgaria v Yugoslavia | L | 1-2 | International Friendly | |
| 25 Mar 1934 | Bulgaria v Hungary | L | 1-4 | FIFA World Cup | Group 8 |
| 01 Apr 1934 | Yugoslavia v Bulgaria | W | 2-3 | International Friendly | |
| 25 Apr 1934 | Austria v Bulgaria | L | 6-1 | FIFA World Cup | Group 8 |
| 29 Apr 1934 | Hungary v Bulgaria | L | 4-1 | FIFA World Cup | Group 8 |
| 25 Dec 1934 | Bulgaria v Yugoslavia | L | 3-4 | BALKAN CUP | |
| 30 Dec 1934 | Bulgaria v Romania | L | 2-3 | BALKAN CUP | |
| 01 Jan 1935 | Greece v Bulgaria | W | 1-2 | BALKAN CUP | |
Please note: Match history is complete for the Premier and Football Leagues and (in most cases all) internationals.