In sports all over, there are certain rivalries fans look forward to when the World Championships in Berlin begin this year, one of those will be in the Women's 200 metres.
In that event, two-time champion Allyson Felix of the United States will battle two-time Olympic champion Veronica Campbell-Brown of Jamaica in a mouth-watering clash.
The most decorated female athlete in Jamaica, Campbell-Brown, who finished fourth in Helsinki four years ago and second in Osaka at the last championships, will be hoping to take her first title in this event and, in the process, deny Felix from making it three in a row.
Season performance
Both athletes have been very quiet this season in the half-lap event. Campbell-Brown, who clocked 22.37 seconds to win at the Barcelona meet last Saturday and who is ranked number three, has only competed in the event three times this season.
Felix only has two outings so far with a season best of 22.66 seconds done in California in May. At the United States National Champion-ships, she clocked a wind-aided 22.02 seconds. The wind reading was a positive 3.2 metres per second.
While the likes of veteran Debbie Ferguson-McKenzie of The Bahamas, with a world-leading- time of 22.32 seconds, is showing good form, she is not expected to be a threat to Campbell-Brown and Felix who are better than the field.
Doubling at the meet
The Jamaican will be doubling at the meet, as she will also be competing in the 100 metres, which is expected to be four rounds of competitive action.
This could affect her chances, as Felix will be very fresh coming into what would be her only individual event.
This could be an advantage to the Jamaican, however, as any result in the 100 metres could serve as motivation.
A win over the shorter distance could make Campbell-Brown more confident going into the half-lap event but interestingly, a defeat could also mean bad news for her main opponent.
A defeat could make Campbell-Brown anxious to make up for her loss and history has proven that she does very well when this is the case.
Despite suffering an injury earlier in the season, Campbell-Brown is a tough campaigner and she has looked in good nick in her past two 100 metres races. Felix, on the other hand, seems to be struggling.
Both athletes have contrasting running styles as the Jamaican will be hoping to use her superior early speed to steal a march, while Felix, the stronger of the two, will be hoping to use her strength at the end to pull her through.
Last year it took the Jamaican a personal best of 21.74 seconds to win gold in Berlin while at the last World Championships, Felix won in 21.81 seconds. In Berlin, it could take another sub-22-second run to win.