Senior Janata Dal-United leader Sharad Yadav today met Congress president Sonia Gandhi amid talk of a joint presidential candidate being put up by the opposition.

Gandhi, who has emerged as the central force in uniting various parties on the issue, spent some time discussing the current political situation.

However, Yadav, whose name is among one of the probable candidates, termed the meeting as a mere 'courtesy call'.

"It was merely a courtesy call," he said.

Hectic negotiations are on among opposition parties for putting up a joint presidential candidate to replace incumbent Pranab Mukherjee.

Gandhi has met several opposition leaders, including Bihar chief minister Nitish Kumar and Left leaders Sitaram Yechury and D Raja, in the recent past over the issue.

Sources said the Opposition is trying to put up a united face and jointly fight the presidential poll even though the numbers have tilted in favour of the National Democratic Alliance after Uttar Pradesh assembly election results.

The sudden flurry of opposition activities comes in the wake of the BJP's winning streak in states since the formation of the Narendra Modi government in 2014.

It currently has governments in 13 states and is a junior partner in the ruling alliance in Jammu and Kashmir and Andhra Pradesh.

Some feel that the opposition unity for contesting may well turn out to be a precursor to an anti-NDA front ahead of the 2019 Lok Sabha election. -- PTI