Sam Curran is enjoying a Championship debut to remember.
The 17-year-old has taken the first three Kent second-innings wickets to go with his five in the first innings.
Earlier Surrey were all out for 311 as Kumar Sangakkara struck 110 - his 53rd first-class century.
Curran also showed some promise with the bat hitting a breezy 18 not out to give Surrey a third batting bonus point.
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