Si Jiahui leads Luca Brecel in World Championship semi after opening session

It was a see-saw session at the Crucible. 

Si Jiahui took a 5-3 first-session lead over World Championship semi-final opponent Luca Brecel (Zac Goodwin/PA)

Chinese youngster Si Jiahui snatched a 5-3 lead in an intriguing first session of his World Championship semi-final showdown with Luca Brecel.

The 20-year-old, who came through qualifying at the Crucible to make the latter stages, lost the first frame, but produced back-to-back clearances of 125, 102 and 97 to punish Brecel for errors with a near-faultless display of break building.