** Investec downgrades WPP to "sell" due to pressurefrom clients on traditional media
** WPP on Thursday reported its worst annual salesperformance since the global financial crisis
** Investec sees traditional media losing a share of whattheir clients spend, "whether to digital platforms, smaller,more agile players and/or consultants"
** Sees the change reflected in co's lower long-rangeearnings per share growth target, in contrast with global adgrowth of 3 to 4 pct
**5-Star rated analyst Steve Liechti also sees WPP at morerisk than peers due to a lack of net business wins in Q4