Jurgen Klopp needs to win the Premier League with Liverpool if he is to be considered among the club's great managers, according to Craig Johnston.
The former Borussia Dortmund boss has become a hugely popular figure with fans at Anfield since taking over in October 2015, thanks largely to his side's enthralling attacking style of football.
However, silverware has eluded Klopp since he arrived on Merseyside – they lost the EFL Cup and Europa League finals in his first season in charge, while they are yet to finish higher than fourth in the top flight under his guidance.
Klopp will hope to end that barren run on Saturday, when they face Real Madrid in the Champions League final, but Johnston does not thank victory in Kiev will be enough to cement his place among the top managers in the club's distinguished history.
Asked if he needed a league title to truly establish himself as a Reds great even if he wins in Europe, Johnston told Omnisport: "I think so, such is the nature of the game and Liverpool people.
"We all love beautiful football and trophies. Why? Because we've had them and we're used to them and they define us. The talking stops when you say put your medals or trophies on the table.
"To be a true great, he has to win medals. I think he's a great man and a great manager. I think he can do it personally, because he's different to all the rest we've had for a long time. Like [Mohamed] Salah, I love him dearly."
Johnston won five league titles and the European Cup in a seven-year spell with Liverpool during their dominant years in the 1980s.
The former midfielder thinks Klopp has got the players and fans believing similar levels of success are around the corner and has challenged the board to match the manager's ambition when it comes to the spending money in the transfer market.
"Liverpool are on track because the players are on fire, Klopp is winding them up, the fans are all behind them and it's back to the glory days," he said.
"Instead of naming individual players to come in, the club itself and owners have to up their game a bit to match what the players, the manager and the supporters are giving them.
"These guys are playing their hearts out and playing beautiful football but we need reinforcement and that comes from the vision from the top. That's where we have to lift our game a little because if we don't, it will be recognised.
"We have to keep bolstering the squad with quality and class. That's how you became a true champion going forward."
19. September 2018
|Otavio would trade goal for Porto victory as he bemoans Schalke draw|
|Championship Review: Pacesetters Leeds crush Preston, Villa end five-game winless run|
|Neymar world-class but not a defender - Klopp says Liverpool targeted PSG star|
|Waiters injury update: Heat guard unlikely to be ready for start of season|
18. September 2018
|Gojowczyk eliminates returning Tsonga in Metz|
|Liverpool enjoying best start in 57 years after PSG win|
|Galatasaray 3 Lokomotiv Moscow 0: Terim´s side make light work of Russians|
|Club Brugge 0 Borussia Dortmund 1: Super sub Pulisic scores late winner|
|Schalke 1 Porto 1: Fahrmann saves one penalty, but Otavio scores another|
|Red Star Belgrade 0 Napoli 0: Points shared as Italians fail to make possession pay|
|Liverpool 3 Paris Saint-Germain 2: Firmino strikes late as Reds edge five-goal thriller|
|Monaco 1 Atletico Madrid 2: Costa and Gimenez seal comfortable win|
|Chaos reigns in Serie B as league denies suspension claim|
|India secure Asia Cup victory despite valiant Hong Kong effort|
|Messi makes "extraordinary routine", says Valverde after Barca star surpasses Ronaldo|
|Spalletti´s Inter to take heart from Tottenham turnaround|
|Casillas features in landmark 20th Champions League campaign|
|Spurs deserved more from best performance of the season - Pochettino|
|Brown absent from Steelers facility on Monday due to ´personal matter´|
|Toronto´s Bussey given eight-match biting ban|
|Barcelona 4 PSV 0: Marvellous Messi lights up Camp Nou|
|Inter 2 Tottenham 1: Icardi, Vecino complete dramatic late turnaround|
|Allegri, Chiellini defend Costa over spitting ban|
|Firmino only fit enough for bench duty|
|Kovac applauds Sanches ahead of Benfica homecoming|
|Tomlin confirms Steelers WR Brown was absent from facility on Monday|
|Mourinho tells United to follow Federer´s lead amid Young Boys pitch concerns|
|Costa banned for four Serie A matches for spitting|
|PGA Tour announces changes to FedEx Cup Playoffs format|
|Rashford to start against Young Boys, Mourinho confirms|
|Ryder Cup heading to Congressional in 2036|
|I never listen to stupid things - De Gea unconcerned by criticism|
|Aguero trains as Mendy sits out Man City session|
|Lampard fined after accepting improper conduct charge|
|Serie B suspended after Pro Vercelli win appeal|
|Mitchell returns to England as defence coach|
|Brady completes Cornet upset in Guangzhou|
|Lopetegui giving no guarantees to ´fighter´ Navas|
|Di Francesco denies racially abusing Costa|
|Saunders apologises for ´sickening´ online video|
|Tianjin Quanjian 0 Kashima Antlers 3 (0-5 agg): Semi-final spot booked in resounding fashion|
|Madrid cannot live on Ronaldo´s glories, warns Ramos|
|Real Madrid are Champions League favourites, insists Man City coach Arteta|
|Stokes & Hales charged with bringing game into disrepute|
|Stephens slips to Vekic defeat in Tokyo|
|Simeone should teach Griezmann values - Ramos questions Ballon d´Or ambition|
|Arteta ready to step into Guardiola´s shoes after missing out on Arsenal job|
|Naive or scheming - Ozil´s agent slams Kroos, Neuer and Muller|
|Bolton´s Darby forced to retire after Motor Neurone Disease diagnosis|
|Root vows dressing support for Moeen over Ashes abuse claims|
|Madrid more dangerous without Ronaldo - Dani Alves|
|Federer fires ominous Djokovic warning to rivals|
|Arsenal confirm Gazidis departure to Milan|
|Man´s best friend? D´Arcy Short ruled out by dog bite|
|Salah has strong bond with ´friend´ Klopp|
|Mistakes were made in Serena´s US Open row - Federer|
|Burgess wants ´truth to come out´ over lewd video allegations|
|Injury brings premature end to Sharapova´s season|
|The next one´s mine - Griezmann underlines Champions League desire|
|A novice coach and a solar-powered stadium – who are Champions League debutants Young Boys?|
|Free-scoring Liverpool and PSG do battle, Kane eyes elite club - Champions League in Opta numbers|
|Braves fall to Cardinals, still move closer to clinching NL East|
|Mack leads Bears past Seahawks|
|Maradona makes winning start in Mexico|
|Barcelona captaincy has changed Messi, says Bartomeu|
|Lithuania qualify for FIBA World Cup after double-overtime win|
|Yelich makes history with another cycle|
|Silva: PSG, Liverpool have world´s two best attacks|
|It´s like a cow seeing a train – Pochettino uses unusual analogy to talk experience|
|Brady discusses Patriots´ trade for Gordon|