Complex sentence: Nehra started playing first-class cricket for his hometown, Delhi, in the 1997/1998 season and made his Test debut against Sri Lanka at Colombo in 1999 and his ODI debut against Zimbabwe at Harare in 2001.
Split into simpler sentences: Nehra started playing first-class cricket for his hometown, Delhi, in the 1997/1998 season. Nehra made his Test debut against Sri Lanka at Colombo in 1999 and his ODI debut against Zimbabwe at Harare in 2001.