A second century of the JLT Cup to Ben McDermott - along with a brilliant stand 123 between himself and the in-form Jordan Silk has led Tasmania to a grinding three wicket win over South Australia with an over to spare at Bankstown Oval today in Sydney.

Set 237 for victory following yet another stellar effort with ball in hand and in the field, the Tigers recovered from the early loss of Wade and Webster to pass the Redbacks total via McDermott's 102 from 120 balls.

Young quick Riley Meredith has eight wickets for the tournament and was again the pick of the Tigers bowlers, Gurinder Sandhu took multiple wickets again and there was one each for Jackson Bird, Tom Rogers and Beau Webster.

View the full scorecard here.

On a wicket which perhaps wasn't as good for batting as it looked, the Tigers took full advantage of being asked to bowl first in Sydney's western suburbs and tied the Redbacks down throughout their innings.

The addition of Beau Webster's off-spin appeared to add another dimension to a bowling cartel which had already been performing strongly throughout the tournament.

With the willow, the Tigers fell behind the eight ball early through the first over dismissal of Wade and Webster who followed shortly after.

It then became a recovery mission for McDermott and Silk who ground their way through some impressive Redbacks bowling before setting their sights up getting the Tigers over the line.

Things looked to be heading all the Tigers way until an incredible piece of fielding from Kane Richardson sent Silk packing for 71 from 84 deliveries.

Simon Milenko came in after George Bailey holed out and steadied the ship again for the Tigers, but when he went for 21 from 27 in a partnership of 46 with McDermott, the Tigers started to look shaky.

Rogers and Rose came and went meant Gurinder Sandhu was at the crease with 22 still required and McDermott tiring, the game was tightening up.

The runs and balls ledger was evened up and then swung in the Redbacks favour before some of the most handy overthrows you'll see brought the Tigers five runs when there shouldn't have been one before a gigantic Gurinder Sandhu six onto the eastern hill of Bankstown Oval all but secured the Tigers win.

The Tigers will have the opportunity to play for top spot on the table heading to the JLT One-Day Cup Finals when they take on Western Australia from Drummoyne Oval in Sydney on Monday.

Watch all the action live on the cricket.com.au website or app from 10am.