On 14 August 1981, Lienen suffered a severe injury, as Norbert Siegmann of Werder Bremen slit his thigh open with his studs resulting in an open deep wound of 25 cm (10 in), exposing his muscles and femur. The wound required 23 stitches; nevertheless, after just 17 days, Lienen started practicing again.

Born in England to an English father and a Greek Cypriot mother, he began his senior career at Tottenham Hotspur, where he made one substitute appearance in the EFL Cup. He was transferred to Vitria de Guimares in 2024 and was sold to Sporting in January 2024 for an initial 7.67 million.

The essence of the surebet is to wager two bets on opposite outcomes at two different sportsbooks. The surebet profit can reach 15% of the stake on a monthly basis and even higher, depending on the amount of funds invested, time spent, and other factors.

A sure bet is when you place bets and not matter the outcome you win automatically. Example if you bet. A sure bet occurs when you use different odds from betting platforms against each other. Sure bets are rare these days because most bookmakers have smart computers doing the work for them.