By Sanjeev Shetty

Vitali (right) is poised for the first go against Lennox Lewis

Mrs Nadezhda Klitschko must be a proud woman - she raised two sons who both stand over 6ft 5ins, can speak four languages and could defend her honour if required.

But can they really fight?

Vitali Klitschko will get his chance to fight WBC heavyweight champion Lennox Lewis on 21 June, while brother Wladimir rues his shocking loss to Corrie Sanders in March.

Lennox Lewis profile

BBC Sport takes a look at the brothers and analyses whether either has a realistic chance against Lewis.

VITALI KLITSCHKO Born: 19/7/1971 Titles held: WBO heavyweight title Qualifications: Doctorate of Philosophic Sciences Interesting fact: Vitali never sees his dreams

Vitali, the elder of the brothers, employs a boxing style not dissimilar to that of Ivan Drago in Rocky IV.

With his hands low, he tries to appear relaxed, but his foot movement is limited and he frequently looks off balance.

Wladimir has more composure, carrying his hands higher, throwing a textbook jab and looking patiently for openings.

Verdict: Neither brother is good enough

Both the Klitschkos must have eaten their Shredded Wheat when they were growing up - with physiques like Roman Gods, they punch with brutal power.

Vitali probably hits harder and that compensates for his lack of mobility.

But Wladimir's ability to put together combinations makes his power that much more devastating.

Verdict: Half a chance

WLADIMIR KLITSCHKO Born: 25/3/1976 Titles held: WBO heavyweight title Qualifications: PhD in Physical Training and Sport Interesting fact: When he was young, Wladimir dreamed of being a traveller

Vitali Klitschko has not displayed problems with stamina or his chin, but his sole defeat raised question marks about his character.

Ahead on points against American Chris Byrd, Vitali withdrew before the start of the 11th round, citing a torn rotator cuff.

Many observers, particularly in America, believed that his action showed a lack of intestinal fortitude, with many of the greats having battled against broken jaws, noses and other ailments.

Wladimir's stamina and chin have been questioned in his two defeats.

His first loss, an 11th round stoppage loss to journeyman Ross Purity, was a result of the Ukrainian running out of energy and in his last fight, South African Sanders floored Klitschko four times in two rounds.

Verdict: Bad news for Ukraine

Both the Klitschkos are multi-lingual and have substantial qualifications.

According to most, they are the epitome of charm and are comfortable in front of the camera when not boxing.

At 32, Vitali is nearly five years older than Wladimir and his older brother mentality was evident when he challenged Sanders immediately after seeing his sibling demolished.

So convinced with Wladimir's package of charisma and talent were American cable company HBO that they signed him to a 10-fight deal.

Because of that, he is sure to rise again.

Verdict: Breath of fresh air

Personality doesn't win fights, although in Muhammad Ali's case, it unnerved plenty of his opponents.

But even if you took Vitali's chin and stamina, Wladimir's skill and power, it would not be enough to beat Lewis, one of the best heavyweights ever.

A game of chess would be a different matter and the Klitschkos have challenged Lewis.

Both of the Ukrainian brothers are accomplished players.