The incident happened at Gainsborough's Northolme ground
Lee Smith: Tamworth footballer left in critical condition
Tamworth footballer Lee Smith is in intensive care in hospital following an on-field collision with another player.
The 24-year-old-midfielder underwent emergency surgery and had his spleen removed after being stretchered off in Tuesday night's 2-0 National League North win at Gainsborough Trinity.
Walsall-born Smith, signed this summer from Romulus, was sent on as a substitute in the 70th minute.
But five minutes later, he accidentally clashed with an opponent.
After receiving treatment, he was then taken to Lincoln County Hospital.
"Lee has had his operation," said a club spokesman. "It was successful, but he is still expected to be in intensive care for the next 24 to 48 hours."