• Chien Lee wanted 50% stake in Premier League club • Owner still interested in a deal, but not in selling club

Steve Gibson has no intention of selling Middlesbrough after rejecting a £50m offer for a stake in the club.

Gibson, who steered Boro back from the brink of financial ruin in 1986, is not interested ether in a full sale or a partnership, but is open to potential new commercial avenues.

Sources on Teesside have confirmed that the owner and the consultant Peter Kenyon met the Chinese businessman Chien Lee, whose OGC Nice Investment Group Ltd owns the French club Nice, and associates in October.

Subsequently, an offer amounting to around £50m was made for a 50% stake in the club, although it was swiftly rejected. However, the two parties could yet work together as Gibson attempts to increase Middlesbrough’s global profile.

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The 59-year-old local businessman joined the club’s board at the age of 26 and led it through liquidation in 1986 before reluctantly taking on the role of chairman eight years later.

Gibson has backed the head coach, Aitor Karanka, in the transfer market to enable him to end Boro’s seven-year Premier League exile with promotion last season.

Lee has previously held talks with Hull City, but failed to strike a deal with the Allam family, and is also understood to have made overtures to Middlesbrough’s north-east neighbours Newcastle United and Sunderland.

News of the discussions with Gibson emerged as rumours circulated that Karanka had parted company with the club on Monday evening after criticising sections of the Riverside crowd in the wake of the 3-1 Premier League defeat by West Ham United on Saturday.

However, the speculation was ill-founded and the Spaniard, who was banished from the training ground for 48 hours after a bust-up with some of his players last season before Gibson brokered a truce, remains in post.

That said, it is understood that his comments have not gone down well, albeit there is an acceptance that he may have misinterpreted exhortations from the stands to “attack, attack, attack, attack, attack” as encouragement to play the kind of long-ball football he appears to detest.

Karanka, who accused fans of having “a short memory”, said after the game: “I am really upset with the last 10 minutes because we didn’t play in the way that we have to play, in the way that we know to play, and it was because the atmosphere was awful today because they [the crowd] demanded a lot of the players.

“We don’t know how to play in that way – playing that way, we didn’t create one chance. The team was broken on the pitch and it’s a thing that I don’t like at all, so we need to improve. They need to understand where we were last season, two seasons ago. I think these players deserve more respect.”